Hey, very long time lurker here (I've actually been around on and off since C3C), just unlurking to say a few things about that mod.
First something about that "Infinite Turn Bug" some folks had problems with. I got this one too twice in my game, but was able to get my game running again. In both cases the freeze was caused by one civ being one turn away from researching a technology they already had. After I assinged them a new research, the game went on just fine. Could this be related to the tech diffusion option or maybe barbarian civs (if I'm not mistaken, both civs were upstart barbs)?
For the folks, who are eager to continue their frozen games, here's a little rundown of what I did. Maybe it's of some help.
First play to the turn just before the freeze and save. After that go into worldbuilder and save as scenario into the /Caveman2Cosmos/PrivateMaps folder. Load that scenario and see if it works, just to make sure it's not an art related problem. Then reload your faulty save and declare war on everyone. (Best to do this in worldbuilder just to be sure you got everyone.) Then end the turn. If it works and you can go past the freeze you might be lucky.
Now reload the save and declare war again, but exclude a civ. If it still works, you can be sure it's not that civ which is causing the problem. Repeat that reloading and declaring war until you find that one civ. (This can be tedious, I know. Especially if you play with many civs. But it's the only way I found so far.)
When you know who's causing your freeze, it's time to use the wonderful CivChanger. For it to work you will have to start your game in cheat mode. (Go to the /my documents/my games/beyond the sword folder and open up civilizationiv.ini. Search for "CheatCode = 0" and replace the 0 with "chipotle" without the quotation marks.)
Load your savegame and then press "Ctrl+Shift+l". You'll get a nice little box with a dropdown menu. Select the bad civ from there and press "Ok". You are now in charge of them.
(From here you will have to do a bit of your own detective work. With my games it was easy, seeing the civ in question was one turn away from discovering a new tech, but looking at the technology advisor it was evident they already knew that.)
After you made your corrections, press "Ctrl+Shift+l" again and change back to your old civ. You should have advanced a turn already. Advance one turn more to see if it really worked. Then just save and play on, until the next freeze.