Is there any document with the specifications of this "USAI Keyboard"?
I've only found a few facebook and youtube references on google, but nothing formal.
Another question: what kind of modifications are you trying to implement in VMPK, and why are you unable to program it yourself?
I am personally very busy; with very little free time, and too many personal projects needing my attention. It is unlikely that I would devote effort to your project instead of mines, but anyway I would answer concrete questions and give advice, if you want and find a team.