What exactly are you going to offer in return for this?

With enough work it is possible to add certain capabilities to JJ2... but it's not easy. Also, your level will require a patch or external utility for anyone who wants to play it.

Do what jake said and just deal with the fact that it takes a bit of extra space. If you want to make it look good, cover it up with lair 3, or hide the trigger events with layer 5. There are all sorts of things you can do.