HOw do you make a body kit look like it is molded to the body?

just use the Edit--->Transform tools like scale, perspective, distort, and rotate, to get it in the right position. THen change the color to match the body. I hope thats what you were asking. Keep in mind that not every kit will work with every car (or look right anyway).

on the under side of the molding line (the lines i presume you want to fill) you will have a colour, on the top the same select this colour and air brush over the lines

register at photo-chop.com
then visit this link

http://www.photo-chop.com/forums/viewtopic.php?t=283

zammo has created AWESOME tutorial on how to do a body kit!