I am having a problem installing Firefox via Kpackage. Here's what I am getting:

installpkg //home/administrator/Downloads/firefox-1.0PR-i686-linux-gtk2+xft-installer.tar.gz ;echo RESULT=$?
firefox-installer/xpi/en-US.xpi
firefox-installer/xpi/help.xpi
firefox-installer/xpi/talkback.xpi
firefox-installer/xpi/xpcom.xpi
firefox-installer/config.ini
firefox-installer/header.xpm
firefox-installer/install.ini
firefox-installer/license.txt
firefox-installer/watermark.xpm
firefox-installer/firefox-installer
firefox-installer/firefox-installer-bin
RESULT=0
<.0PR-i686-linux-gtk2+xft-installer.tar.gz ;echo RESULT=$?
sh: installpkg: command not found
RESULT=127


What am I doing wrong?