Hi, I have some software that can automatically do it, I can put it through it, send the model back with the rig. If it does not work, then no payment - my skype is glenbhunter, if you want to speak further :) Also, I have a lot of experience with tying animations with mecanim and then programming it here's a great example of some of my work with mecanim and animations - [login to view URL]
Also my portfolio can be viewed here - [login to view URL], one question, is the character a humanoid?
Regards
Glen Hunter