Okay,

I have one hard drive that has SuSE 9.0 on it. Im using this right now alone on a Onboard RAID card. Now i want to put another Hard Drive, this one has Win XP on it, on the same RAID board. Plus I want to be able to Dual - Boot them...

Can someone please help me

thanks you

A) You will need to add XP to the SuSE boot menu
B) You will need to edit the XP configuration to show it what disk it's on.

Could you please tell me how to do this?

Thanks alot

Assuming SuSE is using Grub:
edit the /boot/grub/menu.lst file, as root:
[insert text editor (like 'pico')] /boot/grub/menu.lst
Add a few lines to it:

title Windows XP
rootnoverify (hd1,0)
chainloader +1

I'm guessing Grub will call the Windows drive 'hd1'; (hd1,0) means the first partition on the second drive.

The menu will be set up properly when you start to see error messages from the Windows bootloader (or if you're lucky and it boots fine). To fix the errors, you will need to edit the 'C:\boot.ini' file to tell Windows what hard drive it's on.