I got the sim switching figured out and is working perfectly fine. Great job!!!
On the 3g video calling, this Rom has the option since this contains the stock dialer (I think), and it is working fine as well. I tested all your other roms but don't find the video calling option.
You have a thread in the original development section on how to install stock 'kk Rom (hadiyalkishan's rom files). It's it possible to enable 3g sim switching in that? I'm willing to try to cook it up if you can teach me how. I understand you'll not have the time for individual request