Wondering how to combine two mods...

I know this might be a reach but would anyone by chance know how to combine two mods of the same car?

I have an older version of a popular BMW E36 with a bunch of cosmetic mods such as body kits, blast pipes, etc. all custom in Blender and wanna transfer the stuff to updated version of same mod.

The updated version just has more base configs such as convertible, wagon, etc.. If anyone would be able to help it would be greatly appreciated. There are many more people out there with much more JBeam and Blender knowledge than I and am still learning.

Thank you!

 

in principle you'll just need to put the parts in a vehicle folder with the same name, and make sure the slot names in the jbeam are the same.
making meshes line up and jbeams attach appropriately will probably be more difficult.