I downloaded a PSX game that I own (so calm down legal babies). Anyway I didn't want to burn it just thought it would be easier to download it. So when i finished downloading I got these three files .CCD 1KB .img 712 MB and a .sub 23MB. I need to convert these files to an .iso so I can put it on my psp. Can anyone help me?

Look if you are against downloading games you already own then just don't post.
look i need to combine them they aren't any use to me apart and just by renaming the .img to .iso wont work because i need the .sub because sony liked to hide important files there