install question - boot partition
I have an odd problem. I upgraded an old thinkpad 600 from a p2 to a p3. To get the hardware (and BIOS) to work correctly I had to disable L2 cache in the BIOS. I've found a script that enables it in Grub, and I've successfully had it work in both ubuntu and PCLinuxOS, but want to run Mandriva Xfce... However the install goes fine, but as soon as I swap out the /boot/grub files in Mandriva 2008 Spring One (which is necessary to enable the L2 cache for my tpad script), it fails to boot and drops me to a grub> prompt.
I haven't found any help so I'm trying to be creative here. If I install Ubuntu, and add a boot partition, then install Mandriva Xfce over the root partition of ubuntu but DON'T install the mandriva bootloader, will this potentially solve my problem? If so, how do I set up a boot partition. I have an idea, but I'm sure its not as easy as I'm thinking.
I appreciate any help you might have.