I know how you can distinguish BC from 1.10o.
Highlight block to show spoiler: check the anims.j2a file, the animations of BC are completely different from that of any version of JJ2. Just have a simple check that looks for Batteryman, and if it finds him in a specific animation(Just pick an animation of Batteryman and pick a frame), and if it does, it goes into BC mode, if not, it goes into 1.10o mode. And I don't mean for it to check if a frame exists, I'm talking about checking that a frame matches what it looks like for the BC anims file.

I hope this helps.

EDIT: I have a suggestion: Online Colaberation(WebJCS-style)! ... That is, unless there are technical limitations or if it's already been suggested.