i have 2 hard drives in my pc. one is 146 gig ubuntu linux, the other is now fedora 7 30 gig. i've just installed fedora 7 on the second hdd (30 gig), not touching the ubuntu. but now when i switch to boot into ubuntu, it gives me this:

Grub loading stage 1.5

Error 15

i don't want to lose all my files by doing a clean install by putting ubuntu back on the 146 gig because i know my files are still there. is there any way i can repair the grub to make it boot correctly. please help. thanks in advance!
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asta la Vista, Windows

Yes, there is a way.

I think the problem you got is that the fedora 7 grub changed ubuntu's files
on a boot partition or ubuntu /boot dir.
You can try to install the same grub to both systems.
Just run as root
$/sbin/grub-install HDD
where DEVICE is the ubuntu's HDD

I think you can keep the /boot/grub/grub.conf file unchanged, once both systems appears at the list.