The FMV version that Spike hacked bsp2 support into is here:
http://triptohell.info/moodles/junk/markv_bsp2.zip
Haven't tried it myself yet though.
For actually beta-testing a map, I expect you'd want players to use the engine that it will actually be played in on release, but RMQ is a bit of a tough sell for the general Quaking public...
ANYway, I can give it a try this weekend in whatever engine you want. If there's some particular build of RMQ that is necessary please be specific about which one and where to get it.