There is a great web page that details the steps to dual boot your PC/server.
Follow the directions to a 'T' - do not skip past any step.
I followed them last night and I am now dual booting W2K and Red Hat 7.2 (using Grub) with no problems.
Two things I've seen that cause problems - people reference the wrong drive in Linux (for example I was referecning my hdb3 and not hdb1 which is my boot partition) and second, I was using Notepad to edit boot.ini. Wrong! You need to edit the boot.ini file like the web page says.
I hope this helps those having problems.