Xdelta is a popular binary diff-patcher.

It's a reasonable alternative to OUP 
as long as the patched version is known 
by the modder (e.g., the Mac or PC demo)

Before you can install a binary mod 
(that relies on xdelta for installation)
you'll have to set up Xdelta here.

Please run the installer for your platform:
	pcwin32.bat	Windows
	macintel.sh	Intel Mac
	macpowpc.sh	Power PC Mac
	linuxdiy.sh	Do It Yourself ^^

The result of the installation is that 
xdelta3.exe will appear in this folder.
(It will be called when installing mods)