OK,
To try and make things abit clearer.....

I booted into Redhat. I tried to install an adsl modem using the gui tools available, just like you would using a dialup modem, I just went through the settings, first i went through internet connection wizard and then used the gui it brought up to try and configure the modem. After my attempts had failed........

I rebooted and something seems to have happend to the bios as i was only greated with a series of bleeps, the only thing i touched in redhat was the internet wizard and the modem settings. I couldn't access the bios settings, it just bleeped 3 times and stopped(just like it does when theres no video adapter available)

From what i can see at this point is its either a hardware problem or a bios problem, but i can't see how that could be related to configuring a modem in redhat.

hope this is a bit more help, i won't be able to tell you much more till i have another look tonight after work.