I agree with Karin, if the old enclosure is small enough to fit in the new one, just put it in, take out excess webbing in the old enclosure and leave the T to get out by itself, or try to coax it out.
If the old enclosure is too big, go to Westpack and buy the biggest container you can find! Put both enclosures in the container take of both lids and enjoy directing traffic! Just keep the lid of the big container close by, just in case they decide to run for it! We have our breeding pair P.cambridgei's in the big container, and we haven't had that much trouble getting them back to their enclosures. And the paintbrushes and pliers/tweezers are a very good idea!
For the crickets - We use medicine bottles to trap/catch the medium/large crickets. We also keep our crickets in big containers, so they won't be able to jump out, even if they are Olympic medalists! A trick for the pinheads (haven't tried it before, but it's on my to-do list!) - Take a straw, put a piece of organza/chiffon material on/in the mouth end, and suck up the crickets! Then you can let them walk out/blow them out into the T's enclosure.
Good luck, re-housing is very stressful!