1. Start Black Ops and start a new campaign.
2. Once the campaign has loaded just save and quit.
3. Disconnect your USB/HDD and connect it to your computer.
4. Open Horizon (Modio will not work for this. Download Horizon Here.)
5. Look for your .svg in Games > Black Ops > and look for your saved game
6. Open the folder you downloaded from this site and choose the map that you want.
7. Get the.svg and drag and drop in Horizon.
8. Switch the IDs to your profile IDs and Rehash and resign.
9. Save it to your device.
10. Start Black Ops and resume the campaign. There you Go!