So to my knowledge of modeling, Jiggle physics of a specific body group is set with a few lines of code within the .qc file of a decompiled model, This more than likely could be copied from the LAPO playermodels after a decompile but the only issue is that all Interior models would have to decompiled, have their .qc file edited then recompiled - Every single one.
Once the .smd's, .qc and any other file are compiled back together in the proper .mdl file with this change it should work but I couldn't say 100%, It would definitely take some time tho.
