This question is more like a constructive idea for you who are making a mod, since I don't plan to make one right now.
I'd like to ask if it is possible to publish mod-updates via SVN (subversion)? It's just like I get my updates for the other game I play with TortoiseSVN - right click -SVN checkout. That way all my progress is saved and everytime I can continue from that point with the content of the new version, without having to delete the old/dl the new version. Other benefit is that I can update almost daily, update paralell with the game development.
Example. I completed your last demo and saved the game, then SVN in about 3 weeks and continue playing with the new content in.