As the title says, I'm having trouble ugrading MMM 3.5.5 to 3.7 beta. I'm following a FCOM convergence guide (http://devnull.sweetdanger.net/fcominstall.html) which directs me to install MMM 3.5.5 full, extract meshes sounds and textures into the data folder, and then to download the MMM 3.7 beta and do the same thing. However, when I download the 3.7 beta it only has ESM and ESP files in it, with no meshes sounds or textures folders. Other 3.7 beta's I've tried come with a bsa file, which is even more confusing. Any help would be greatly appreciated!

The FCOM Homepage is outdated. Check http://www.gamesas.com/index.php?/topic/1102058-relz-fcom-convergence-and-ufcom/ instead. Go for MMM 3.7b3, which comes with a bsa package and a esp/esm package. Details in the FCOM thread.