A little trick I use sometimes with moderate success is to insert your photo, image or picture into a 3D program, (The Higher End a Program the Better). Put it on a 2D plane then bring it into the camera as close as you can get it, DO NOT STRETCH TO FIT!!! Then Render at your Res and DPI and there you have it. Of course you will need to set the lighting and such to make it the best it can be, but you can come up with some nice larger images this way.

I would rather be Politically Incorrect,
Then have Politically Correct-Incorrectness!!!