So this game Star Wars First Assault is a cancelled Lucasarts game running on the Unreal Engine 3 from 2012/2013 and Umodel doesn't seem to want to open or extract anything from the files other than CharacterTorsoAssets_SF i will provide the files here but as this is the only build of the game it's a xbox 360 build so i can't provide any EXE unless you want the xex.
http://www.mediafire.com/file/x4v74w2ya1un3s7/CookedXbox360.rarEDIT: Here is a little more info on the game when i decompress the xxx files and use umodel i have to disable some options to get it to even extract anything but then it still doesn't everything everything and this is the error.
appMalloc:size=1429406512 (total=3 Mbytes) <- FArray::Empty:1163079731 x 16 <- TArray::Serialize:0/0 <- FStaticLODModel3<< <- TArray::Serialize:0/160 <- USkeletalMesh3::Serialize <- LoadObject:SkeletalMesh3'TriggerGame.amo_crates', pos=163BD83, ver=852/8, game=ue3 <- UObject::EndLoad <- CUmodelApp::ShowPackageUI <- Main:umodel_version=580