What to expect from a torn ACL surgical procedure..?

I want to know what to expect from this whole process. I completly tore my ACL and am for sure getting surgery. I just wanted to know what happens before and after the procedure. But first..which is better for an active patient hoping to play sports after the surgery..cadaver or hamstring replacement? Which is more painful and why? Also some questions about the actual surgical experience..What happens with the anesthesia and such before? Does it completley knock you out? Is there an IV? Or is gas used? Is the insertion of the IV the most painful part of the actual procedure, or is that numbed as well? Can you feel anything during the surgery? After the procedure..do the painkillerers relieve just about all amounts of pain? What part is most painful after the operation? Sorry for so many questions, I am very nervous and I would greatly appreciate any and all input/experience involved with an ACL reconstructive surgery.