[LAU] kernel install problem redux

Greetings, Here's the scenario: My notebook includes an Ubuntu 8.10 installation and one for 64 Studio 3.0 beta 2. Recently I added a new rt kernel to the Ubuntu installation. The active grub menu/loader is on the 64 Studio partition, so I copied the information from the Ubuntu /boot/grub/menu.lst to 64 Studio's menu.lst. I figured that since I can boot into the Ubuntu non-realtime kernel from that menu, I ought to be able to boot the new kernel just as easily. Alas, it just ain't so. The kernel loader fails every time with an error saying that /dev/disk/by-uuid/* can't be found. Before I get advice re: the whole UUID mess, know that I've already replaced the uuid strings with the direct drive specification (/dev/sda1) and that I still receive the same error, but referring to /dev/sda1 instead of the uuid spec. In other words, it doesn't work. This weirdness bothers me: My regular Ubuntu kernel loads without troubles from 64 Studio's grub menu, yet my rt kernel (2.6.24-18-rt) won't, even though it has the same uuid. Grrr... So, I ask again: Is there some way to update grub in 64 Studio so that it will load my Ubuntu rt kernel ? Has anyone else run into this problem ? It's certainly well-known on Google, but so far none of the suggested fixes have worked. Anyone have any further ideas for me to try ? Best, dp