This is something that I have struggled with most
of today. So, I will post it here, for anyone
else who might have a similar problem.
I bought another Dell, running XP, and then a second
hard drive. I installed RedHat on the second hard drive.
For the boot loader, I used GRUB, and put it on the main
hard drive with the MBR (master boot record).
Unlike lilo, GRUB did not make the dual booting easy.
It didn't ask me how to configure the boot and
When I went to reboot, I only had the choice for Linux.