Yeah, I'm not really sure how it'd look, haven't tested with RTP characters. I didn't even test this in RMXP because I don't have it, I just place it together in the same program I use to sprite the things. If anyone would like to help me in showing how to place auto-tiles and how they work (if it's any different than RM2K3) and making animated tiles like water, that'd be a good help. I already used the trial of RMXP so I can't go checking there again and I don't wish to download an illegal version just for this.
Hmm. If it's 16x16 corners for the auto-tiles instead of 32x32, then I think I did something wrong. I'd have to go back in and test that.