Hi guys, first off thanks for all your replies and advice.
Being new to the site and not yet being 100% on your rules it's nice to get a steer in the right direction. At this point all my games are un-boxed and shelved. My latest purchase came packaged in a universal game case so I just thought I'd use it for my action 52 cart as it's the only unofficial game I have and looks out of place on the shelf.
I used to be pretty hot on Photoshop but haven't used it for a good 8 years. Also the images I used were found with a quick image search on google, and tidied up a little. Fine for my own purposes but not of sufficient quality for The Cover Project I'd suggest.
I have thought about boxing my whole collection like this, but I've been in touch with media shelving and 1- they don't ship to Scotland, and 2 - I cant bear the thought of modifying 300+ game cases! Maybe one day.
Happy gaming folks!