You need 3ds Max to make renders like you see around here... cost=$3500.00
You can get the 'carviewer' megapack download here for free and it will let you see your car in a basic render... we use it for lining up paint schemes.
You just save your paint scheme as the 'card.bmp' file in the appropriate folder, then open the Carviewer.exe file and select file at the top, then select 'Open Direct X Mesh' and select the type car your working on from the folders.
If you have any problems, just post here.