I think most of the posts about forced socialization are within other posts. The best thing you can do is go through the posts in the "Rat Behavior" forum and see what you can find. Same with the biting ones, really.
Charlotte has been warming up to me more and more since she has been with the girls, and realizes that I am a treat dispenser. But I still can't pick her up! The second my hand goes in to the cage (no matter how slowly) she takes off and I can't catch her.
It won't really help in time for tomorrow, but try luring her onto your hand with the treats. First one or two feet, then three, then a bit further... make her work for them a bit and eventually she should get it. You can make your hand a bridge to your leg and make her come and fetch the treat from your leg or up your arm. As her trust in you builds up, and you have her where you can reach her to pick her up, you should be able to start with the forced socialization - if you still need to, by then.