Photoshop Help Please.

I'm making themes for my PS3, and I know how to do that, its pretty easy, but some of the pictures I'm using are the wrong size so when I change the resolution it usualy makes the images look a little stretched or "fat". I was wondering if anyone knew of a way to change the res. without making the images look stretched?

P.S. I need the images to be 1920x1080 so I cant use constain proportions option.

If you're doing it in Photoshop go to Image > Image Size > and then make sure that "constrain proportions" is checked. Now you can change the pixel value of the height or width and the other will change accordingly.SolidSnake35

Sorry you must have wrote this while I was editing my original post, any other options?