The boot disks shipped with RH52 have an old (5.1.2 vs 5.1.6) of the aic7xxx driver and do not allow an AIC7880-based system to boot properly (repeated bus timeouts and hangs) Fix: new images with latest driver, the same contained in the kernel in updates/ (that works, I tested it)
This is a know problem. We have new boot.img and supp.img files that can be obtained from: ftp://ftp.redhat.com/pub/home/msw/images/ Either use the rawrite utilities in /dosutils of the cdrom or use the dd command from a working Linux system to create the new boot disk. You may reopen the bug if that doesnt help.