Help with GRUB

I just installed RH 9.0 in a new HDD set as slave in a logical partition(my comp came with XP pre-installed in the Master HDD) and made it install GRUB in the MBR. Everything works fine, i can dual-boot XP and Linux by choosing which to boot in the GRUB window. But i also installed SuSe in another partition in the slave drive (hdb7), the problem is that I think GRUB doesnt read SuSe so I was just wondering if there was a way to make GRUB recognize SuSe.
Thnks.

As long as SuSE is installed on a compatible partition (ext2, ext3, fat, and I think reiserfs) grub should be able to read it. Type 'info grub' at the command line for more information on how to configure you're grub.conf file and so forth.

Well I installed SuSe in a Linux ext2 partition but GRUB still doesn't recognize it, I wonder if there's a way to edit the GRUB so that it recognizes SuSe.