You'll have to enter the first line (and all following lines) yourself. Then save the file on one of Your fixed drives. When you boot next time, You can just mount the fixed drive, and start it (as root) - it will work as if You would enter the commands manually. For example, You could creat a file called "wlan-start" on the first partition of the first hard disc drive. (This would be c:\ under Windows, and hda1 under Linux.) This file should contain something linke this (example, with windows wlan-driver in c:\wlan-driver\):

#!/bin/sh
echo "Setting up wireless networking."
ndiswrapper -i /media/hda1/wlan-driver/bcmwl5.inf
modprobe ndiswrapper
# This is a comment: You could also use ifup / ifconfig / iwconfig for networt setup here:
netcardconfig

For the moment, i will stay to ndiswrapper (i also have 54mbit here and no interruptions at all) - but i'm looking forward to using bcm43xx in future versions of this driver (and Knoppix, containing newer kernel/drivers).

Greetings