1) Yes, the Tracker works fine, and as long as your team number is 37726, you'll be Folding for OCN.
2) Actually, if you're Folding on your CPU, you will need a passkey. You can request one from here:
3) AFAIK, v3.52 is the latest version of the Tracker. That person may have been confused with the source Folding client version.
Thanks and yes I am using my cpu on both rigs. another question if you don't mind on my one rig I did that auto detect and it did not set the gpu3 client on the GTX260's in that one so I selected the GPU3 client and after the first round with it off the second round with it on the PPD went down but my points went up and one other strange thing lol the temps went down on the GPU3 setting lol by 10~12c in fact. so I ask is it better to run gpu3 client or just leave that unchecked?