I remember someone reporting it a couple of weeks ago and it started crashing my games during setup last week too.
But your comment made me wonder, if it was not caused by some other mods, so I ran a quick test without any other mods now and to my surpise it worked!!! I tried adding more mods then and found out that it seems to be the combination of CBP+Communitas map+Really Advanced Setup mod which causes the game to crash during setup. I apologize if I mislead anyone with my previous comment.
It is curious though, because this combination used to work for me with the pre-Christmas versions.
Will update my previous post ...
Nice to know I can still rely on the CEP-map for my map-pool. There really aren't enough good mapscripts out there.