I use a variety of things to feed my cresteds. I alternate the CGD with apricot and peach baby food. Then every now and then i put in some crickets and the freshly molted (white) mealworms. At first my cresteds went nuts for the live food but once i started feeding the baby food and CGD more often they have become more accustomed to that and kinda just stare at the crickets & mealworms.
I use a very deep glass bowl for the insects and i jsut put in some crickets for Zeus and Ziggy. Neither one have come over to that side of the tank yet so i don't know if they are going to eat them.
Right now i have a container full of crickets that just won't STOP cherping.....i'm about to go batty. I thought i fed off all the males that cherp but i missed a few LOL.
Red 
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Crested Gecko Zeek:1.0, Ziggy and Zeus
LEOS: Boo: 1.0 normal , Bronx & Nala: 1.1 blizzard,
Lily: 0.1 patternless, Abby: 0.1 albino, Zoe: 0.1 reduced pattern, Dot: 0.1 hypo
New Girls: Flame, Karma, Bubbles and Bell pics coming soon
Chip: 1.0 papillion (small dog)