I was originally going to wait until the hack was pushed through moderation to post a thread about it. However, in the three weeks I've waited, not only have I fixed a little more stuff, I started another hack and completed it through the first world. I was originally going to show off both SMR and the SMR2 demo in this thread, but I have a limited amount of time on the internet and a dial-up connection means having to wait forever to upload images.
The plot: Immediately after his defeat in SMW, Bowser swipes Peach and the seven eggs and flies off into the distance. Mario follows, very annoyed.
There are 6 levels, about medium/medium-hard difficulty.
NOTE: This is a different version than the one in the hacks section of this site. I would absolutely love it if someone with the appropriate power would replace this with the older version (and moderate it). There is a link to it in my signature.