Instructions
Open a new window in your Internet browser and go to the Fallout Mod Manager entry on the Fallout 3 Nexus web site.
Click the "Files" tab to navigate to the Fallout Mod Manager files listing. Click "New FOMM" to start downloading the Fallout Mod Manager.
Select the "Run" option when the download prompt for your selected download appears. If no download prompt appears, check your Internet browser's security notification system at the top or bottom of your Internet browser window and give the browser permission to download the file. The Fallout Mod Manager installer will start once the installer is completely downloaded.
Click the "Next" button when the Fallout Mod Manager installer starts. Select the "I accept this agreement" option at the license agreement page and click the "Next" button. Accept the default installation directory and program group settings or choose a custom installation directory and program group with the "Browse" button.
Select additional installation options such as desktop icons and file format associations and click the "Next" button. Click the "Install" button and the Fallout Mod Manager will install to your computer. The Fallout Mod Manager is now ready for use.