Well, I don't know if you'll be able to do it (having to work on two hacks, I guess doing 2 hacks on GBA may be possible, but on GBC, are you sure?). But, you know what you are doing. If you'd ask me, you should do the one you are having more fun with (which I guess it's this one... :P)
Good luck to you, liquinn. And make all the TR fans happy! (Now I retire discretely before they steal my pokemon... XD)