You can just grab a copy from nearest vista machine, as i did to have WMM for x86 on 64-bit vista. WMM Live sure does looks and works like crap, but hey, i remember the earliest beta, it was more like, just video cutter\trimmer. Also good thing is that Live does work with matroska (ogg, flv etc) however it still needs codecs (like ffdshow) to render them.