basically long story short: every single time i try to export with s2 unimesh, milkshape crashes. I've spent hours on a creation, so this is really really disheartening lol

i've made plenty of mods for sims 3 with no issue, but it just doesn't want to export a sims 2 mesh for some reason?

Can you upload the milkshape file? Also, if you're making an object that doesn't have bones or joints, you could export it as an .Obj file, if that's an option.