Sure if you have the 360 version I can help.
First off you need a flash drive that has been formated for your X box.
Download Horizon the x box mod tool. I can't post links yet so you will have to google it.
then download the modded .gpd file for Black ops: The place I downloaded it from was 4shared dot com. Just type '41560855.gpd' in the search filter and the one to click on should say 'mod' right next to the file as the size is 278 kb.
Once all that is done, follow these steps:
1: Delete the title update #11 or this will not work. If you have any map packs that you bought they will come back when you re-download the update.
2: Move the profile you would like to use to your formatted flash drive and insert it into your computer.
3: Open up Horizon and your flash drive should show up on the right hand side of the window.
4: Find the folder 'Gamer Profiles' and expand it. left click and drag your profile to the center of the window. This should bring up your profile and all of its contents.
5: Click on the 'Contents' tab and find the 41560855.gpd file which is the black ops file.
6: Right click it and click 'replace' and find the modded file you download and replace it with that.
7: Click 'Save, Rehash and resign' and click 'ok'.
8: Move your flash drive from the computer to your x box and load black ops. You will only be able to use Kino or Five for this mod.
9: Once in the level press the 'back' button for god mode, max ammo, increased speed and mustang and sally. If you want to fill them up faster than collecting so many max ammo's just keep pressing the back button repeatedly. It will tell you in the upper right hand part of the screen if god mode or noclip is on or off. Press start for noclip.
NOTE: The only way to pause the game once the mod is activated is pressing the home menu and then closing the home menu.
10: Have fun!
I'm still trying to figure out how to get god mode and noclip for second player on split screen. They can get max ammo and increased speed but nothing else.
Sorry if this seems too long but I use this mod all the time and it works like a charm for me.