I have a number of ideas on this. The USM was a good idea, at the time. However, with the TSL patcher, and other mods that can overwrite things, how about this instead? That the team that put it together take certain key elements out, refresh things, maybe even add a few more to their own, slap it all together to use with the patcher, and go from there. That's my first idea. Then, as each person who is good with mods adds their own sabers, someone can then bundle them together, and make an essentially new USM with the patcher, and without the headache. I know it sound arduous, and hard, but it may work better. And this way, everyone can pick and choose what they like, and use that, instead of an all in one shot.
When everything else fails, CHEAT!