I have 3 HD's in my pc. 1tb for samples, 1tb for audio projects and 500gb for OS.

I have a dual boot of win 7 64 and win xp32 currently. My aim is to install snow leopard over winxp32. The partition is already there. I have booted up empire efi and can see my available drives. I have erased my win xp32 drive. I exit disk utilities but all the HD's & partitions have yellow exclaimation marks next to them and it says i must repartition the HD. It says if i do this i will lose all data on the drive which will erase my win 764 partition. What to do? I dont understand why it wont let me just install leopard onto my chosen partition.

Your help would be really appreciated.