You can read the details of this over at my blog, but I wrote a quick and dirty app to help me crank out covers for my stuff. The program can not do anything too complex, it just takes a template image, and pastes other images at the locations stated in the .ini file. So for example, you could have Sonic - Front.jpg and Sonic - Back.jpg, Mario - Front.jpg and Mario - Back.jpg, and it'll create Mario.jpg and Sonic.jpg.
So it takes this:


and makes this in less than 1 second:

You just load up a folder with all the images you want, and it'll spit out the covers. No GUI options, no CLI, just run the program, receive covers. There's MAJOR limitations however, it can not do layers, and you still need to get the source image in good shape. Details and the actual program can be found here:
http://rhwiii.info/blog/archives/1083Note: I'm a security engineer\government defense contractor. So if you don't want to run software from a stranger, that's a good thing. But I thought I'd share it anyways incase anyone wants to try it out. It's great if you have 30+ covers for a system to fill in, and they're not listed here. If you have 1-3, do it the right way or make a request.