A.,
I had the surgery done on both of my hands. It was painful, but I did it seperately and I didn't have many problems (if you do it at the same time it will take a lot longer to heal and it really isn't good when you have kids, plus how do you wipe? lol). Basically you just get a little cut in your wrist and they stick a tool up inside and release a blade that cuts the carpal tunnel release. The first week isn't too bad b/c you have stitches and a hard support on yoru hand that you just have to watch and not get wet. Normally the stithes get removed 6 days later and you have just an ace bandage to cover the area and exercises to do. You will slowly build strength back up in your hands and it will be a lot better than before.
I still have problems in my hand, but the surgery was experimental because I tested negative on the other tests. Most people who have the surgery like getting the relief and are happy they did it (I work in a big office with a lot of people who have had it done). I know my pain is a lot less painful than what I had before! I'm not sure the area that you are from, but my surgeon is in Harrisburg and he was phenomenal! The nerve test was painful, but if you got cortizone shots in your hands then you should be able to handle that pain okay. Good luck and keep us updated.