You may:
1. Use a BAT or CMD file which allows the use of REG commands. You either call the file directly (in a shell) or double click on it. This is ideal for batch processing.
2. A REG file allows you to add, delete or modify registry entries directly.

A sample CMD and a sample REG are provided. 
Click here to download:

Registry.zip (0.8 K)

WARNING!
Be advised that the Windows Registry is the backbone of Windows. If you decide to make changes to the registry, please create a backup before doing so.