How to mod black ops zombies *offline*

Okay, so basicly this will teach you how to mod black ops zombies offline.

*Do not try to mod it online as it will not work with this method.*

the things you need:
modio
a modded gpd file(blacks ops is 41560855.gpd)
usb
an xbox account

1.you need to go and save your account onto the usb
2. after this or before you need to go to your memory and delte Call of duty black ops title updates
3.plug your usb into your computer and open up modio
4.once open, click explore a device
5. then hit file, open/close drive
6. after that your profile should be there and then you go down till you find your profile(will look something like E0000C93FABOOD91) but random looking
7. drag your profile onto your desktop and and minimize the explore a device
8.after that go back to modio and click open a save and find your profile on your desktop and open it
9. click on file contents and find 41560855.gpd(this is black ops) right click it and click replace
10.replace the original with the modded one(you can find any on google) then go back to general file info
11. click rehash and resign then wait for it to say xbox 360 dashboard on bot. right
12. now open explore a device back up and replace your new modded profile
13. plug your usb into xbox and there you go, new modded zombies have fun

here is a good video tut.

the video also has a modded .gpd file you can use and has instructions on how to use them.