At first I was going to say yeah, but correct me if I'm wrong here--the MBR resides on the primary HD, and since that's the chunk of code that takes control from the BIOS, would both OS's have to be on the primary?
OR
Would a Boot Manager such as System Commander be able to handle having two (or more) OS's on multiple hard drives?
I thought this would be covered in the COMPTIA A+ Certification guide, but I'm not finding it...