How to delete the updates:
1st.) Unplug ethernet cable from your xbox to disconnect from the internet
2nd.) Go to System settings > Memory > Hover over HDD > Press Y > Clear system cache
3rd.) Go to System settings > Memory > HDD > Games > Black Ops > Delete the TU's
Working perk upgrades:
1st.) Download my GPD
2nd.) Open my GPD in Xero
3nd.) In the 1st column, change all of the "KOOLKAT"s to your gamertag
4th.) Save GPD and exit
How to put the GPD on your profile:
[Text]
(USB)
1st.) Download my GPD and put it on your desktop (or anywhere I guess...)
2nd.) Go onto your xbox and move your profile onto your usb
3rd.) Open USB xtaf and put the profile on your desktop
4th.) Open Modio and open your profile by clicking the "M" and then "Open file"
5th.) Go to "file contents" and then right click on 41560855.GPD and click "replace"
6th.) Locate the GPD I gave you; double-click it
7th.) Go back to general info on our profile and hehash and resign
8th.) Open USB Xtaf and delete all profiles in it
9th.) Drag the newly modded profile (should be on your desktop) into the content folder
10th.) Put the USB back into your xbox, sign into your profile on the dashboard
11th.) Start Black Ops, ignore all of the settings
12th.) Go to zombies > solo > kino or five
13th.) PLAY!
(Transfer Cable)
1st.) Download the premodded profile.
2nd.) Open it in WinRar
3rd.) Open Xport360.
4th.) Open Content.
5th.) Drag and Drop it into the content folder.
6th.) Sign in the profile on the dashboard.
7th.) Start Black Ops, ignore all of the settings.
8th.) Go to zombies > solo > kino or five.
9th.) PLAY!
[Video]
YouTube - How to mod any .GPD 
Offline Zombie GPD's 
Linear Mode
