conflict between old beta (6.0 had 2 betas) and current build

[drats666]

okay 6.0 originally had a beta build up for at least a day and in that time i downloaded it. the problem is the beta build was soon removed and a few days later it was replaced by a different one. well my launcher never noticed the difference. the original beta build had mffs mod in it, which included security stations etc. well the replaced beta didn't and now neither does the 6.1. so my question and problem is this, what about the maps generated from the build that had the mffs in it? and why was this wonderful mod removed?