Video call handling on Symbian OS (Nokia 3rd edition)

Our company is currently looking for some experienced programmer that already worked with Videocall on Symbian/Nokia platform.

Our goal is to be able to send (and receive) custom video on the "video call" upstream.

The videocall it's a circuit switched channel on which H324M/H245 protocol it's used.

We would like to be able to "manipulate" the content of such channel in order to send our data.

Someone was able to do that by using undocumented AT commands:
http://discussion.forum.nokia.com/forum/showthread.php?t=81638

Still we need to do that on platform device and not on serial port.

If Symbian and/or Nokia partnering it's required, that's not a problem.
The relevant things is to have the knowledge to do that and "how" to do that.

If this is feasible and you know how to do that, you will be for sure our consultant.

Regards
Metid