how do i use a render off of planetrenders and put it into cs3

Well you have you copy it and paste it to Photoshop, then you have to cut out the background, You can wither use the lasso tool or eraser..If you need anymore help pm me

All their renders are PNG format with an alpha channel. They don't have a background.

make a account on planet renders open click the render, right click and save it, then open it via CS3