You can probably also do it from the BIOS config. You know, hit F1 or some other F key when your computer boots up to get to the BIOS screen. From there go to a tab called "Boot" (most likely) and choose which devices you want to boot when your computer starts up and don’t let your slave drive boot up. That should do it. At least I’ve been able to do it like that.

Here’s a neat trick after you get both your hard drives working nicely. Instead of having the swap file, paging file or virtual memory (whatever it’s called) on the primary drive, make the file on the slave drive. It’ll considerably speed up your computers performance since it can store stuff in virtual memory on the slave drive while your doing you high-end stuff on your main drive.

EDIT: Just saw your above post. Nevermind then.