"Can you put both the StarBoard2 and the Stardrive boxes together"
I assume you mean you have a 2MB Starboard as well as another 2MB Starboard equipped with a StarDrive. Is that correct?
IIRC I think you want the StarDrive attached first, and the 2nd additional RAM attached on the outside. But I'd want to scan the original documentation to be sure. It wouldn't hurt anything if you have it the other way, but it's possible the order of the RAM modules matters when a StarDrive is in the mix.
Blake Patterson (
Google him) aka Byte Cellar has this same setup (I think?) and might be able to offer some help if you run into issues.
FWIW I have my Starboard 2 + Stardrive attached first, and SLAM board (8MB modern RAM) on the outside.