Its the _Civ4Config file. In your bts file, you'll see a shortcut to it... double click on that and it'll open it in notepad. Scroll down to where it says: ; Disable caching of xml and file system (may slow initialization) DisableCaching = 0 and change the 0 to a 1. It will improve performance but slow loading a bit. AIAndy is apparently changing some things in regards to this, most of which I'm not understanding fully. My only problem with caching MORE, especially if the mod makes this compulsory, is that from my limited understanding, isn't that going to make it harder for computers with less ram to play at all? I understand I could be completely wrong, but doesn't caching generally mean that we're loading more fixed assumptions into the ram that needs to be held there, limiting ram for other application?