The Mod Installer lets users install mods into their game from a single link click from any website.
Links are created like this:

• Install Mod:

  UMF://Action=InstallMod&&Game=<gamename>&&File=<modfile>&&URL=<downloadurl>

• Uninstall Mod:

  UMF://Action=UninstallMod&&Game=<gamename>&&File=<uninstallpattern>

• Install Mod Library:

  UMF://Action=InstallLib&&Game=<gamename>&&File=<libfile>&&URL=<downloadurl>

• Uninstall Mod Library:

  UMF://Action=UninstallLib&&Game=<gamename>&&File=<uninstallpattern>

• Replace <gamename> with a lower case no space version of the game name.
• Replace <modfile> with the file name of the mod to be installed.
• Replace <downloadurl> with the URL from which the mod should be downloaded from.
• Replace <uninstallpattern> with a file name pattern or file name. This supports wildcards.

In order for this to work the web server must provide the following headers:

• X-Download-Options: noopen
• Content-Disposition: attachment; filename=“<filename>”

Some web browsers may provide these headers by default, but in most cases you will have to configure your web server to add these.