I don't know if you ever considered this, but I think it would be nice if, instead of asking every time for the user to send certain files and what not every time the game crashes, you generated a .zip file that would contain a copy of the log, a copy of the savefile that is being used and a list containing what mods are being used by the player?
The mods don't necessarily need to be annexed to the file automatically, just a list containing the mods's metadata info.