Thrush lad, eaiest way to do this is :

Hard drive on IDE 1 set as Master using the jumper settings on the drive itself, these are located inbetween where the IDE cable goes, and where the power goes. Just use a pair of tweezer's to pull it off, then put it on the appropriate set of pins

I would then use the 2nd IDE channel for the CD-ROM Drives.

I have 2 x 120 gig Western Digital Drives on IDE 1, and a Pioneer DVD Rom and Pioneer DVD/RW on IDE 2

Simple to setup once you get the hang of master / slave settings.

If, you don't have any jumpers, then you can use CS <cable select>

HTH Pal