So you want to install a program onto a slave drive, whilst you are on the master drive? Or do both hard drives work together?

I've never tried it, heck I don't even have a second hard drive, but I think all programs would ask for a directory to install to.

If it's a seperate OS, then I guess you would have to be on the Slave drive first.

If not... Then... Welllllll.... Ask FabianN =P