Pez, FYI Gnome is one of the GUI`s for Linux, a failed install of this shouldnt stop you booting. couple of things to check

1. that you didnt run out of space during your install - sounds crazy but depending on how you allocated your disk space while installing and what packages you installed you could fill up your partition

2. from the redhat site http://www.redhat.com/docs/manuals/l...ARTITIONS-LILO
All the data GRUB and LILO need to access at boot time (including the Linux kernel) is located in the /boot directory. If you follow the partition layout recommended above or are performing a workstation or server install, the /boot directory will be in a small, separate partition. Otherwise, it may reside in the root partition (/). In either case, the partition in which /boot resides must conform to the following guidelines if you are going to use GRUB or LILO to boot your Red Hat Linux system:
3. I know Ive said this before but make sure youve got an XP bootdisc and that you make a REDHAT bootdisc during install that way when things like grub and lilo probs happen you can boot to either op system and fix the problem.

sorry my quote got cropped
GRUB and LILO are subject to some limitations imposed by the BIOS in most x86-based computers. Specifically, most BIOSes cannot access more than two hard drives, and they cannot access any data stored beyond cylinder 1023 of any drive. Note that some recent BIOSes do not have these limitations, but this is by no means universal.
On First Two IDE Drives
If you have 2 IDE (or EIDE) drives, /boot must be located on one of them. Note that this two-drive limit also includes any IDE CD-ROM drives on your primary IDE controller. So, if you have one IDE hard drive, and one IDE CD-ROM on your primary controller, /boot must be located on the first hard drive only, even if you have other hard drives on your secondary IDE controller.