Sadly it's a no about distributing modified copies (see this chain) :c If you want to distribute mods, you've gotta do it awkwardly by distributing all your edits with instructions of where to add them, or hack things together by using a patcher program and providing the patch (though you can only use one mod that way...).
It rather killed my enthusiasm for making further mods or any other contributions - I was totally prepared for making new content, as well as providing edits to the game to make it more modding friendly, and fixing any bugs I came across - but with the policy and waiting in limbo for a response, I moved on to other things Q_Q