Also which .15 will be the one of the 2009 Season?

Current as of OS Website
11523 - 15 CV-X
11642 - 15 CV-RX (S) w/10ER

Discontinued as of OS Website
11500 - 15 RX
11522 - 15 CV
11540 - 15 LD
11550 - 15 LD-X
11607 - 15 CV Hyper W/10A
11608 - 15 CV-X Hyper W/10A
11630 - 15 CV-R W/10E
11631 - 15 CV-R W/10C
11632 - 15 CV-R(P) W/10C
11633 - 15 CV-R (S) W/10E
11640 - 15 CV-RX W/10ER
11641 - 15 CV-RX W/10C

Once again dont want to find the wrong engine somewhere?

Correct part number for the S15CV is 11523. It only comes in the pull start version, and you have to cut the nipple off of the crank and put a regular back plate on it. The OS12cv back plate fits perfectly.

Awesome, I knew you would answer me soon, this will also be good reference for others.....