These are part of an old guide I did for the Belt CP, most of the setup etc is generic to all helicopters.

Converting your Belt CP from stock TX RX to a Spektrum DX6i or DX7. 

Belt cp out of the box, what everything does.

Setting up the head.

Blade balancing and checking centre of gravity.

Blade tracking and gyro setup.

There is a series of videos for the belt CP, for converting to the DX6i on my Youtube site here