http://www.u-boot.realsimulation.com/
Go to the sh3 download section, agree with the terms, and its in big letters on the page. Its quite hard to miss..
Anyways, I've installed and played it last night...I think its a great improvement so far, eventhough I haven't played for a long time.
I had to do some playing around with the files in order for it to work but you have to look in your other thread for that.
http://www.subsim.com/phpBB/viewtopic.php?t=49872