You may be lucky enough to have one that's happy to hand-feed a little, but judging from the size of your flexarium in the other thread presenting the food to her somehow might be a wise decision for a little while. I don't know if chameleons can become dependent on such methods of feeding, but you may have to until she grows a little bigger.
I saw in one threat on here than an owner (I can't remember who) placed their chameleon in a smaller container with the crickets while it fed, and once it had eaten its fill was placed back into the enclosure. This might be an idea if she isn't fond of being near a cup and/or isn't big enough to "hunt" in her enclosure.