I don't think what you're asking for can be done. The 1 drive hack is skipping over the detection of the 2nd drive. So if you have a 2 drive Empeg, it doesn't know until it's attempted to detect it. For the kernel to disable the menu item, it needs to know if you have one or two drives, which means it can't possibly use the 1-drive hack anyway.

Maybe in the future Mark could write something to allow people to choose which menu options are enabled/disabled in their config.ini. If that were done, all menu items would be availlable until config.ini were read, though.

I would personally put that feature way below a half dozen other kernel features, though.