Well, we managed to do the same thing that was done back in March - convert the e200 to an e200R, and then convert it back. e200tool was required, but it wasn't hard. Using a modified R bootloader, we tried to get Rockbox to load, but the Sansa froze. However, the Sansa did not say load main image failed, so I'm going to try again and see if I can get it working.

What I've found:
Rhapsody seems to be able to find the hidden partition, as it says the disk has 20.4 MB of used disk space, right after formatting. Windows says that 440 KB is used.

Rhapsody doesn't seem to be able to license the "e200R" saying the license is corrupt.