Howdy. Ive actually modified the old fprot script to use dialogs. I dont have the net so i dont know if this works, so let me know! So here it is anyway. just modify what is needed from the post above

Code:
#!/bin/bash
#
# install_fprot - Install fprot. Userful in combination with persistant home
# Author Fabian Franz <[email protected]>
#           Allan Stones <[email protected]>
# Licensed under the GPL
#
VERSION="1.0"
FPROT_NAME="fp-linux-sb.tar.gz"
FPROT_DIR="$HOME/software/f-prot/"
FPROT_DL_PATH="ftp://ftp.f-prot.com/pub/linux/"
[ -z "$HOME" ] && HOME="/home/knoppix"
INTERACTIVE="yes"

clean_exit()
{
  [ -n "$TMP" ] && rm -f "$TMP"
}

function setup_dialog()
{
  # Set up dialog
  XDIALOG_HIGH_DIALOG_COMPAT=1
  export XDIALOG_HIGH_DIALOG_COMPAT

  TMP="/tmp/install_fprot.tmp$$"

  DIALOG="dialog"
  [ -n "$DISPLAY" ] && [ -x /usr/bin/Xdialog ] && DIALOG="Xdialog"

  [ -f /etc/sysconfig/i18n ] && . /etc/sysconfig/i18n

  MAX=4 # number of steps

  case "$LANGUAGE" in
   *)
     BT="F-Prot-Installation"
     T1="Installation of F-Prot (Step 0/$MAX)"
     ET="Installation failed"
     ST="Installation succeeded"
     MESSAGE0="This script installs the F-Prot Antivirus from the internet or from a directory of your choice.\n\nAuthors: Fabian Franz <[email protected]>\n         Allan Stones <[email protected]>"
     MESSAGE1="Shall F-Prot be downloaded from the internet?"
     MESSAGE2="Please insert the directory name, where $FPROT_NAME can be found."
     MESSAGE3="PATH not found. The script will be terminated."
     MESSAGE4="F-Prot Antivirus was successfully installed."
     MESSAGE5="Script aborted by user"
     MESSAGE6="ERROR occured during installation."
     ;;
  esac  
  N=1; # Step 1
}

while [ $# -ne 0 ];
  do
    case "$1" in
      "-ni"|"--non-interactive")
        INTERACTIVE="no"
	;;
      "-i"|"-interactive")
        INTERACTIVE="yes"
	;;
      "-h"|"--help")
        echo "Usage: install_fprot [OPTION]..."
        echo "  -i,  --interactive            - Interactive Dialog mode (default)"
        echo "  -h,  --help                   - This help"
        echo "  -l,  --location <directory>   - Where to find the flashplugin"
	echo "  -ni, --non-interactive        - Non interactive install mode"
        echo "                                  if not given it is downloaded"
	echo "                                  from the internet"
	echo "  -v,  --version                - Display Version information"
        exit 1
	;;
      "-l"|"--location")
        FPROT_PATH=$2
	;;
      "-v"|"--version")
        echo "install_fprot.sh Version 1.0 for Knoppix 3.2 (03-03-2003)"
	echo "---------------------------------------------------------"
        echo "Authors: Fabian Franz <[email protected]>"
        echo "         Allan Stones <[email protected]>"
        echo ""
	echo "Description: This script installs the F-Prot"
	echo "             Antivirus from the internet or"
	echo "             from a directory of your choice."
	echo ""
	echo "Licensed under the GPL"
	exit 1
	;;
      *)
        echo "install_fprot.sh does not recognise this commandline argument."
	exit 1
	;;
    esac
    shift
  done


[ "$INTERACTIVE" = "yes" ] && setup_dialog

if [ -n "$DIALOG" ]; then
  #Introduction Message
  $DIALOG --backtitle "$BT" --title "${T1/0/$N}" --msgbox "$MESSAGE0" 15 70
  N=$(($N+1))

  #Shall F-Prot be downloaded from the internet?
  $DIALOG --backtitle "$BT" --title "${T1/0/$N}" --yesno "$MESSAGE1" 15 70
  # Grab result of yesno box
  EXIT_CODE=$?
  N=$(($N+1))


  case $EXIT_CODE in
    0) # Yes, then download from net
      cd /tmp
      if [ $DIALOG = "dialog" ]; then
        wget $FROT_DL_PATH
      else
        xterm -e wget $FROT_DL_PATH
      fi
      N=$(($N+1))
      ;;
    1) # No, then select path where file is located
      cd /tmp
      $DIALOG --backtitle "$BT" --title "${T1/0/$N}" --inputbox "$MESSAGE2" 15 70 "$FPROT_PATH" 2>$TMP
      EXIT_CODE=$?
      case $EXIT_CODE in
        0) # Yes
          N=$(($N+1))
          FROT_PATH=$(<$TMP)
          if [ -e $FROT_PATH/$FROT_NAME ]; then
            cp $FROT_PATH/$FROT_NAME /tmp
          else
            $DIALOG --backtitle "$BT" --title "$ET" --msgbox "${MESSAGE3/PATH/$FROT_PATH/$FROT_NAME}" 15 70 # error!
            exit 1
          fi
          ;;
        1) # Aborted by user
	  $DIALOG --backtitle "$BT" --title "$ET" --msgbox "$MESSAGE5" 15 70
	  exit 1
	  ;;
      255) # Error
          $DIALOG --backtitle "$BT" --title "$ET" --msgbox "$MESSAGE6" 15 70
          exit 1
          ;;
      esac
      ;;
   255) # Error occured during installation
      $DIALOG --backtitle "$BT" --title "$ET" --msgbox "$MESSAGE6" 15 70
      exit 1
      ;;
  esac

  # Now we should have a /tmp/$FROT_NAME

  if [ -e /tmp/$FROT_NAME ];
  then
    mkdir $HOME/software
    cp /tmp/$FROT_NAME $HOME/software
    cd $HOME/software
    tar xzf $FROT_NAME
    mkdir -p $HOME/man/man8
    mkdir -p $HOME/bin

    ln -fs $(pwd)/f-prot/f-prot.sh $HOME/bin/f-prot
    ln -fs $(pwd)/f-prot/check-updates.sh $HOME/bin/check-updates
    ln -fs $(pwd)/fprot/man8/f-prot.8 $HOME/man/man8/
    ln -fs $(pwd)/fprot/man8/check-updates.sh.8 $HOME/man/man8/

    # Setting up Manpath & PATH for f-prot
    cp $HOME/.bashrc $HOME/.bashrc.templ
    cat $HOME/.bashrc.templ | grep -v "export MANPATH=\$HOME/man" | grep -v "export PATH=\$HOME/bin/"> $HOME/.bashrc
    echo "export MANPATH=\$HOME/man/:\$MANPATH" >> $HOME.bashrc
    echo "export PATH=\$HOME/bin:\$PATH" >> $HOME/.bashrc
    rm -rf $HOME/.bashrc.templ

    # Fix paths
    cp f-prot/f-prot.sh /tmp/f-prot.$$
    sed 's%/usr/local/f-prot/%`$(pwd)`/f-prot/%g' /tmp/f-prot.$$ > f-prot/f-prot.sh

    cp f-prot/check-updates.sh /tmp/check-updates.$$
    sed 's%/usr/local/f-prot/%`$(pwd)`/f-prot/%g' /tmp/check-updates.$$ > f-prot/check-updates.sh

    RC=$?
    cd ..
    #cleanup
    rm -rf /tmp/f-prot.$$
    rm -rf /tmp/check-updates.$$
    rm -rf fp-linux-sb.tar.gz
    rm -rf /tmp/f*


  else # /tmp/$FROT_NAME not found
    $DIALOG --backtitle "$BT" --title "$ET" --msgbox "${MESSAGE3/PATH/tmp/$FROT_NAME}" 15 70 # error!
    exit 1
  fi
  $DIALOG --backtitle "$BT" --title "$ST" --msgbox "$MESSAGE4" 15 70
else # non interactive
  cd /tmp
  if [ -n "$FROT_PATH" ];
  then
    cp $FROT_PATH/$FROT_NAME /tmp
  else
    wget $FROT_DL_PATH
  fi
  if [ -f /tmp/$FROT_NAME ];
  then
    cp /tmp/$FROT_NAME $HOME/software
    cd $HOME/software
    tar xzf $FROT_NAME
    mkdir -p $HOME/man/man8
    mkdir -p $HOME/bin

    ln -fs $(pwd)/f-prot/f-prot.sh $HOME/bin/f-prot
    ln -fs $(pwd)/f-prot/check-updates.sh $HOME/bin/check-updates
    ln -fs $(pwd)/fprot/man8/f-prot.8 $HOME/man/man8/
    ln -fs $(pwd)/fprot/man8/check-updates.sh.8 $HOME/man/man8/

    # Setting up Manpath & PATH for f-prot
    cp $HOME/.bashrc $HOME/.bashrc.templ
    cat $HOME/.bashrc.templ | grep -v "export MANPATH=\$HOME/man" | grep -v "export PATH=\$HOME/bin/"> $HOME/.bashrc
    echo "export MANPATH=\$HOME/man/:\$MANPATH" >> $HOME.bashrc
    echo "export PATH=\$HOME/bin:\$PATH" >> $HOME/.bashrc
    rm -rf $HOME/.bashrc.templ

    # Fix paths
    cp f-prot/f-prot.sh /tmp/f-prot.$$
    sed 's%/usr/local/f-prot/%`$(pwd)`/f-prot/%g' /tmp/f-prot.$$ > f-prot/f-prot.sh

    cp f-prot/check-updates.sh /tmp/check-updates.$$
    sed 's%/usr/local/f-prot/%`$(pwd)`/f-prot/%g' /tmp/check-updates.$$ > f-prot/check-updates.sh

    RC=$?
    cd ..
    #cleanup
    rm -rf /tmp/f-prot.$$
    rm -rf /tmp/check-updates.$$
    rm -rf fp-linux-sb.tar.gz
    rm -rf /tmp/f*

  else
    echo "Error accessing /tmp/$FROT_NAME"
    exit 1
  fi
fi

exit 0 # Success!
[Edited by Fabianx to have it as code]