Another way to think about it ST is like this. Even a modified exe file is not redistributing the game. For that you would have to supply ALL the game code, there's no mod out there that does that and if that were so , THAT would be a violation of the EULA for sure.

M$ said a few years back that they don't care if their code gets modified as long as nobody else makes money out of except them. This applies to all their software, just look at flight simulator for example. I'll have to find that link to their webpage where they say all this. There is no mention of modified exe files or any other game specific file, all they say is don't modify and sell their games, they don't mind you modifying anything as long as it's all free.

The whole point with all these mods is that you still need a copy of FL, something that M$ still make money out of and something you still need to buy to enjoy all of these wonderful addons made by the community

*** EDIT ***

Found the link. This explains absolutely everything you guys need to know about the EULA and what Microsofts attitude is regarding mods of any game. Trust me, we have nothing to worry about

http://www.xbox.com/en-US/community/developer/rules.htm