Can any one tell me the best way to go live online racing using Nascar 2004 P S 2 game?

Because i have 4 cars of my own ready to race with my own #, & different model,s in Sprint & Nationwide
And the same in Truck,s
Making a total of 12
And just having fun with 4 late models of my own
hopefully i will have them all up to 2010 by 2011 & ready to start racing them all live online Nascar 2004