1) Just extract into your Black Ops folder, replace BlackOps.exe and launch. Select zombies on main menu, then Solo and enjoy !
(Just to be safe, keep a backup of BlackOps.exe)
If you wan't to unlock all Zombie Maps without finishing Single Player :
Add this to Program Files
(x86)\Activision\Call of Duty - Black Ops\players\config.cfg:
seta zombiefive_discovered "1"
seta zombietron_discovered "1"
.:: Trouble Shooting ::.
Error No. 1 :
Having Sound Isuues in Game
Goto where u have installed - Steam/Steamapps/Common/Call of duty Black Ops/Redist/DirectX
and then LAUNCH DXSETUP.EXE
Error No. 2 :
: The lag and the slow performance of the game
Start the game and than press alt-ctrl-delete and open windows task manager and right-click the process: BlackOps and set the priority to low thats helps for people with multi core processors.
In case you want this priority setting to be remembered every time you start black Ops you need right click on the shortcut and change the target to this
(for Windows XP)
C:\Winnt\System32\cmd.exe /c start "Black ops" /low "C:\Program Files (x86)\Activision\Call of Duty - Black Ops\BlackOps.exe"(for Windows 7)
C:\Windows\System32\cmd.exe /c start "Black ops" /low "C:\Program Files (x86)\Activision\Call of Duty - Black Ops\BlackOps.exe"
For more fixes, check :