Ok, I didn't know you were running from cd. If you had a way to store your personal info
that would save you trouble. I forget exactly how to set that up (you could do a search)
Knoppix might allow you to save your files to a floppy.

As far as the isp and modem set up go I have one more idea.
Open a terminal (there's usually an icon on the toolbar)
type "su" (without the quotes) and when it asks you for your
password just press the enter key. Now type kppp you may
have to re-enter your modem and isp info.

Hope that works.