I just made the switch over mainly due to an influx of mouths to feed (I went from 2 mouths to 10 in about 2 months). I found it easiest to first get them to take live from forceps, then take prekilled from forceps. When i finally put them all on f/t they took them from forceps with ease.

I do have two picky eaters, and if they will not take from the forceps i usually just leave it (the f/t rat, not live) in their tub and they take it during the night.