I just found this new hack created with DKedit by 08scatman.
You need to patch it to a Japanese Super Donkey Kong rom.
The difficulty is Japanese. I've been playing for a half hour and can't get past the first level, LOL. It seems he did away with the life counter, which is nice. Don't go into DK's house, by the way.
http://www.youtube.com/watch?v=cMD3GiYk ... ature=plcp (download link is in the description.)
Alternate download: