Re: Windows partition unmounted, stuck in grub rescue!
Virtual machines or live flash drives are the safest way to do this and keep Windows safe. Or, one Wubi at a time. I believe at the end you're going to have to reinstall Windows, deleting all the others. If that happens, size the disk first in the size you want for Windows, and make the remaining space unallocated. Install Windows, and make the unallocated an extended partition. You can then size the extended into separate smaller logical partitions for any amount of OS's that there is room for.
(was trying to figure out which distro I liked the best and had them all installed for comparission).
Install grub into the disk (not partitions).
Starting fresh is the safest, easiest way to get to where you want to get, and you never need to touch the windows partition again.
Remember When Double-Dog dare ya's and water balloons were the ultimate weapon?