Opps I didnt think that through very well. Sorry! You could always rz the file back onto the player even after the upgrade. Emplode is the problem with sneaking the non mp3 file onto the player, not the player itself. I would think the installer would still work. I hide my displayserver files and all the other stuff i dont want erased on the music partition. Does the installer ask where you would like to install the files? Several other people have it working, so there must be a workaround.
Im sticking with the first version of displayserver because it seemed to be more stable on my player, and does the same thing anyway. Let me know how it goes.

Sean