Here's the situation... I'm creating an online car racing game. There are pictures of users cars and parts in a database. The location of which are all stored in a database. All the car parts have their own row in a table of car parts. Along with that is their compatability to other parts and vehicles aswell as the X Y positions of where they must be assembled.
Here's the problem... Every time a user logs in I want to create the users image and then store it in some temporary form. I'm thinking storing the images in the users session as that is what was suggested before. The site is using session authentication.
Anyone know how about I would do this? The part that has me stuck is building multiple images into one using XY corrordinates with a car body as the canvas.
All car bodies follow this same style and size:


