I got my new MBP today and I plan to use MCE's OptiBay to place a second harddisk in the drive bay and put Windows via Bootcamp on it, but I heard / read that, at least with Snow Leopard, it was not really possible to install via an external optical drive with the Windows7 DVD. Has this changed lately or anyone done this successfully? rEfit pops up as a solution, but I wanted to know whether it's possible with the stock bootmanager/bootcamp assistant in Lion?
I have a new MBP 17 with my SuperDrive replaced with a hard drive, and with the SuperDrive mounted via USB externally. I have not been able to install via BootCamp, due to what I understand is some new issue with USB and EFI. I haven't heard of people having success with rEFit with the latest machines. The one solution that seems reliable is to open the machine and put the SuperDrive back into the second bay. The secondary drive can be put into the primary bay for Windows to be installed to it, and then the SuperDrive again removed and the drive with the BootCamp partition moved back to the optical bay. I can't verify the
Please note, I have yet to do this myself with my machine, though I plan to attempt it as soon as I get a few free hours.
I do not believe this is an issue of Windows 7 or OS X Lion, but rather an issue with Boot Camp itself. I believe that Boot Camp is designed to be used with the Mac's internal hard drive (or drives).
While I have never owned a Mac with more than one internal hard drive, I don't see why Boot Camp would not let you partition additional internal hard drives as well.
As far as external drives go, I now from experience that the Boot Camp Assistant in OS X Lion (and previous versions of OS X) does not even give you the option to modify the partitions of external drives. Hope this helps.