REWahoo
Give me a museum and I'll fill it. (Picasso) Give
Whenever I have been asked to unfreeze for a particular reason (new credit card, etc.) I have just asked them which agency they use. I unfroze at that agency (most of the time it was Experian) for a day or two so they could process it, then it went back to frozen again.
This is exactly how I did it the only time we had the need to unfreeze our credit.