saving modprobe settings for cd reboot

Hello
I'm booting from cd (3.2) and have to su>modprobe>etc for my network card. Although I have been saving settings via the gui to my hd1, most of which stick when I boot with myconfig=scan, I have to re-enter the modprobe and netcardconfig each time I run Knoppix.

I know I can enter the commands into a file that will remain on the hd, and execute when I boot the cd but where, how?

open a console
create any file with
sudo kedit myfile
then put this into

#!/bin/bash

modprobe etc etc
etc etc


then right click over myfile, properties, permissions and enable execute.
Now you have an script file.
To execute
sudo myfile