I have created a map switcher in AutoIt that will switch your vanilla server's map at X minutes that are designated by you. It WILL take control of the active window, and will type for about 3 seconds. So, don't play unless you want to get bothered every X minutes.

I'm not sure if it will work for x64 systems. Sorry if it doesn't, I'll recompile under x64 circumstances.
What is the shuffle function? It randomly selects one out of the 5 maps, and never chooses one twice in a row.
If you find errors, post here. The only one I know of, is if you close the confirmation screen and re-open it, it'll show all data under 0's. I can re-do this by re-guictrlread-ing, but I'm far too busy to do that.
http://www.mediafire.com/?fnwgf2x7l2ccbhz
(If this isn't the right place to put this, move it)
Semper Games,

Holliday Spessa