Installation:1: Open and extract the contents of the rar file into your ZH directory.
2: If it asks you to 'overwrite' the d3d8.dll. Back up the original first then overwrite it.
3: ???
4: PROFIT

If you want to turn off the shaders while it's still installed, just press Shift F12 to deactivate it.

Uninstallation:
Just delete the contents you installed.

FULL CREDIT GOES TO Boris Vorontsov, the creator of the ENB series Shaders.