RE5 - Any way to start over without losing previous data?

Okay, so I have a file going with my brother and I'm pretty far, but I want to start a new file with my friend, without losing my guns and such from the other file. But whenever I sign in with my gamertag, I have everything from my previous file, like it all carries over. Is there any way to have the weapons from my farther file stay there, and start fresh on another file?

Why would you want to?? Why not just use the file and gain more money and ammo and use it to upgrade your weapons?? Your new friend will have his own file and start from scratch.

If you just want to do the same amount of damage as your friend you can buy some new guns and store your old ones and still build up money to use for your "new" gun and when your not playing with your friend upgrade your good ones.