I found a nice program, which could be usefull
http://www.amxmodx.org/forums/viewtopic.php?p=124019
It's a plugin, which start a vote at the start of round to vote on which chambers shall be first (me think on the noobs who build SC first....)
the only problem is this "NOTE: Plugin will bug if you build 2nd hive before voting time is over (on first chamber). Only way this can happen is if your using sv_cheats 1 "
and i remember on " giveres " <- maybe there could be a conflict