I have a copy of Civ 4 BTS on Steam and have enjoyed it greatly. I recently discovered there are some custom mods here that looked interesting, one of them is the Navy Mod. I thought I would try it and so I copied the folder into the custom mods folder and loaded up the game. I went into mods and it didn't show up at all. I then found a thread somewhere (can't find it now) that explained to install custom mods you need to copy the content to the BTS folder that's found in the "My Games" directory (I have windows 7). I tried that, and now the game won't even start. Did I just wreck my copy? If so, how do I install this properly?