LS4 Performance - Tuning '08 GXP

Just bought a GXP last weekend and want to play with the tune. Have HPTuners and have pulled the stock tune. It seems that I can't do anything with it as HPT says it isn't supported yet?

So what's everybody using? I'd rather stay with HPT since I've had that since '05 but don't know when I can use it.

HPtuners supports 08' GXPs...I would e-mail bill if you are having issues.

Dang, I'll do that. Probably what I should have done in the first place. Thanks.