CentOS 4.1 - Hang on boot

[tom.brown at goodtechnology.com (Tom Brown)]

Hi

Trying to install 4.1 on a chassis that has an Intel hardware RAID card 
in it - RedHat 7.3 was fine on this box.

On boot the install runs through until i opt to skip the media test - 
After that it 'loading gdth driver' and the system hangs

Any ideas as google is not my friend

thanks