More detailed COD: MWII presence
You shouldn't delete the other files if you just want to change a single line. I'd recommend maybe deleting your fork and recreating it, or learning how to rebase your fork (although that's a bit more difficult).
I've just uploaded the assets on my fork like #2 suggests, although I've prefixed both the Rocket League example assets and MW2 assets with a game prefix. So to prevent conflicts I've basically changed all the images to "mw2_logo.png" etc. If you could change that on your fork too that'd be great. Let me know if there's any other questions or issues.
Thanks, I'm kinda new to github so I dont know all the quirks yet. I'm gonna try to update my fork soon too