quoting off oddball in a thread not too long ago...
"I got all of my preds off of live as follows;
1. always introduce minnows at the same corner of the tank for each feeding.
2. After a few days, the fish will anticipate the feeding by congregating at the "feeding corner".
3. Drop one minnow. Then, one stick/pellet. The preds should by now snap at anything from the "feeding corner".
4. Add more sticks/pellets to their feeding schedule until they're on full stick/pellet diets.
This process took less than a week to convert all of my preds. I haven't fed out minnows in months. "