... inlcudes all previous fixes, such as the AP fix. I think it is version 1.2.4.When you get it, I think you place it in your Wiz8 folder (C:\Program Files\Sirtech\Wizardry 8\ by default) and "unzip it" there.
If you don't have an unzip utility (like WinZip), you can get it from somewhere like download.com.
Tools for Wizardry(r) 7