David thanks for replying.
Here's what happened since I posted.
I changed the setup for both hard drives. I let the computer find both under "auto". I installed Mandrake on the slave drive, after I turned the main hard drive to off, for right now. After installation, I reset both to "auto". Now when I boot my system, a little window comes up and asks where I want to go: i.e. windows, mandrake, etc. All I had to do is highlight which way to go. Now I'm able to use both operating systems.