Not in game you can't. However, if you move them to a flash drive and only connect that when you want to play it that should work.
Move them to a 16gb FAT32 thumb drive. I say 16gb so you can store all the map packs. Put it in the Xbox when you want it and take it out when you don't. Doesn't effect the Peacekeeper btw.
I did this last week and the connection is better than ever