How do you build Red Hat Image Disks?

Matthew Patton asks "RH5.2 is supposed to be 2.0.36 but it isn't quite there. Notably the install tool doesn't offer the AMI Megaraid as a supported device though the kernel release notes say it's supported. I have several boxes with AMI's as their only controller. Thus I can't install Linux on any of them. I have an old RH5.1 (i386) kicking around, is it possible to build the .img floppies off of this, assuming I managed to grab latest codebases for the kernel and tools?"