While this is an old topic...the mod has updated A LOT since. Its really stable (on revision 9115 or the moddb release version), and even more epic than before.
However. One reason I'm posting this. If you use SVN revision 9115 (or newer should work too (didn't test it though), but the newest SVN isn't stable right now, and they are releasing updates that will break saves), then this map is really epic. Its huge though (400 tile width, 112 tile height) so not every PC may be able to play on it. I'm 287 turns in, and its still stable for me though. The MODDB version won't work with the map however, because it uses new water tiles they introduced so it will cause a crash when loading.
https://mega.nz/#!sIRV0bAa!VdipD4XGLGX1fk-YB4-_ArDM5SVHeRscyJ5rrLGzHyIyou'll want to install the file to: Documents\My Games\beyond the sword\Saves\WorldBuilder and then select to play a scenario (custom scenario works, if you want to turn on/off features)
and here are screenshots of the map:
http://s4.photobucket.com/user/Vendayn/library/Caveman2CosmosI didn't make it historic, and space is definitely very fantasy-like. With two "alien" civs (just used Portugal and the Neanderthals). And Mars being more Earth-like, but none of the planets are really accurate. Added a "space ship" (using terrain and stuff that was available), that houses the 2nd civ. And random "asteroids" to explore. Earth I researched what landmarks go where, and roughly where city placements should go. But other than that, I didn't aim for realism at all. Earth is also sort of in an Ice Age, though North America and South America are more warm than other places.
Earth was mostly pre-built with the UEM (ultimate earth map), with some changes to terrain, resources and cities. I'd say 97% of earth was made by the original creator of UEM, and the other 3% was me adding resources, changing terrain, adding cities and landmarks. Doing the terrain (the initial part of it when designing continents etc) is by far the hardest part, and UEM did that already. Mostly what I did was add a huge amount of space to explore, so once one finishes conquering Earth, they can move on to space. Space part took me around 12-15 hours of constant work to finish.
Should make for an epic game though. But the map is massive, and civ 4 sometimes has problems with maps that big (especially on weaker PCs). But with some new features in Caveman 2 Cosmos related to memory and the game, it should work a lot better on a wider range of PCs. Earth itself is already really huge on this map, it'll take ages just to take over Earth lol. And then the space part adds quite a lot too.