Some Questions due to packaging of freesynd

[Tuduri Benoit]

Hello everyone :),

I wrote you because i don't know if i can upload my package on alioth ?
The game using some non free data (map/tiles/music) because the right of 
bullfrog are not in public domain?
My package is composed only of source code of freesynd engine which are 
licencied by GPL. I'm explaining to final user how to play with the game 
  with a procedure to install manually the original data in a specific 
directory.

Your fairthfully,

Benoît