I see ACM V2.5 on many aircraft .cfg files, what program is this and where can I get it?

Aircraft Container Manager - unfortunately not available for FSX, but... from the very same source site you can get a very nice free tool - AAM: http://www.aircraftmanager.com/down/AAM.zip

Thanks! That's fine about FSX, I won't be moving to FSX for a few years, I was flying FS2002 until late 2005...

Well, FM-wise, fs2002 was better than either fs9 or FSX in many aspects...;-)