Thanks for the work ammyt!!!

For who ever wants to try it right away: It looks like some download URLs are slightly wrong (missing 'experimental' in path) in the new installer (only affecting experimental options D and E as far as I can see).

Before starting the installer you might want to put into /home/user/MyDocs/.nitdroid/

for installer option D:
N12_update_2.3.7.tar.bz2

for installer option E:
n14_dev_snapshot.tar.bz2

Both are available on the nitdroid website in the appropriate folders.
Good luck!