I think the ONLY way to share hacks here is by PMing. Or going to a general emulation forum. EDIT: Maybe on Wonderful Wide Web...
BTW what I dislike in the dumping world is the fact some dumpers hoard ROM's. Tszone_fc dumped a lot of Jncota/KT games but he didn't release them, although they DO work on his recent version of VirtuaNES-ex.