1) set your rcb6i to ppm out. Connect the ppm cable to the computer. And open phoenix rc.
2)on the top left corner, click system> setup new transmitter.
3)A screen pops up, click next, it will show some steps,
Click next, another screen with info..
Click next set all switches to off position. Click next.
4) centre up both your control sticks and click next.
Move both stick to thir extreme positions both up down and left right. Click next
Then move all the switches to their extreme positions. Click next.
5) in this window you can whether your controls are working. Yellow bar should move when you give control.click next.
6) it will ask you to create a profile for your transmitter.
Click next.
7) select "other" from list of transmitters. Click next. Click next. Type the profile name.
Choose quick or advanced. Click next.
Map all your channels according to their control.
Ex- on throttle channel, click "unmapped". A list opens.
Move your throttle stick, now you will see a bar moving in a channel, select that channel for throttle.
Do this for all controls.
If you want to reverse a channel, click on invert on that channel. CLICK "FINISHED".
9) IT will say you have successfully setup your transmitter
Click finish.
And you will be ready to fly.
Hope this helps.