hey,i need help, i have downloaded my xbox profile to a usb, it shows, when i download maps it dosent ask what profile to use so when i go to my xbox it says profile unknows so it dosent show the maps

You will need to copy and paste the ids.

Whenever you use another gamesave you need to change all the id numbers that are showing to your id numbers, rehash and resign and then you will be right to go.
If you are going to be doing it on a regular basis, I suggest copying your id numbers down and leaving them on your desktop for convenience.