Things You'll Need
Instructions
Download the most recent version of "NVSE" from Silverlock.org. Save the file to your desktop for easy access.
Unzip the file and place the new folder on your desktop.
Pres the Windows key and E simultaneously to open the Windows Explorer. Navigate to your hard drive and then "Bethesda Software."
Double-click "Fallout: New Vegas" in the "Bethesda Software" folder.
Open the "NVSE" folder on your desktop and select all of its contents.
Drag those files into the "Fallout: New Vegas" folder and select "Replace" when prompted.
Open the "Fallout: New Vegas Mod Manager" and click "Launch NVSE" to load the script extender.