I'm trying to replace the Boba Fett model in SP, and I can get the functionality of the jetpack to work, but there are no flames coming out the thrusters. Does anyone know how to rectify this?

1.open up the game's boba fetf model(glm) in milkshape or 3dsmax or whatever has a ghoul2 importer.
2.look at the names of the little triangles found inside the jetpack's exhausts (jet1 and jet2 or something similar)
3.make sure your model has similar triangles with the exact same names

step 3. most likely involves building your model from scratch though (or importing/adding bones/weighing)