Does anyone know how to create their own car for Nascar Racing 2003 Season?

Can someone please send me instuctions on how to make a car outside of the game? THen how to get it into the game and race with it.

How do you create a custom car for nascar 09?

I’ve been trying for several days now to create a custom truck for NASCAR 09 for the XBOX 360 and I have no clue how to do it. Can someone please help me? Thanks! My xbox 360 tag is slvrmetallicfox

How can i create a Nascar Racing 2003 Season video and put it on Youtube?

I’ve seen people put videos of them playing Nascar Racing 2003 Season on youtube. I was wondering how i do that. Do i need a special program? Help me out.