Tip: Switch palace switches normally disappear if you replay the level. However, if you insert them as direct Map16 and use the hex edit at $00EEB2 in the ROM map, you can replay the level without a problem.
As for me as a hacker, I am only hacking Yoshi's Island, not SMW or SM64. I don't any projects for some time now, however, I've released a full Yoshi's Island. Click the link in my signature if you are interested. I am still moderating the YI forum, though, helping others and waiting for more stuff being found out about the game. I don't have the time for much more, though.