I feel warm all over.... Just kidding I think the heat from hhw's puters is blowing over here.
Anyways.... jamminjonah I think has put together one of the best instruction sheets that I have seen on feeding f/t. There isnt much else that I can add.
I can say this though.....
You will probably find that your BCI will not even hesitate to take the f/t.... if you have warmed it up enough. Put your hand on the head of the rat. If it feels warm, not hot, to the touch then it should be ok. The BCI will probably snatch up the f/t rat as soon as it hits the feed tub and coil and constrict it as if it is live prey.
For the ball python... be persistent... dont give up with two or three failed attempts. Keep in mind that BPs are shy snakes, dont intimidate them with the prey item. Dont hit the snake in the face or head with the f/t rat. First try to offer the rat simply by putting it in the tub and leaving it alone. If that doesnt work try and simulate the movement of live prey.
Good luck... there are many other tricks so keep us posted on the how things are going!