Here it is:
Download Here
I have sent an email to sunplus requesting the full suite of tools, and documentation. It's worth a try imo. Please post if you find out anything special with this program. It looks like it's just for fonts to me, but that might not be true. Good luck, and don't go flashing any Mp4s with it yet! Everyone else has killed theirs.
Edit: While searching around for more stuff I came across what I think is a Sigmatel Mp4 player firmware updating program, but it seems to be "customised" for an NTO player. Get it
HERE if you're interested. The program name is "stupdaterapp". I haven't had a close look at it since I'm not interested in Sigmatel but someone else might find it useful.
Edit again: I have found yet another tool, but I can't download it because the Chinese moron that hosts it feels that only his fellow chinese friends should use it (I think..) The translated page is
HERE, but if you want to attempt to register, you can't do it through the translator proxy. Cut out the url and use that, then cut and paste the parts of the register query to babelfish or whatever you wish to use. I get stuck on the last input. They want some sort of number thing, at first I thought it was a referral number so I left it blank, but it wont let me in. It also says something about external, so I think if I try it through a proxy in China it might work, but I'm not up to installing a proxy program at the moment. Anyone else want to give it a shot?