This utility from Iron Arab helps to streamline the mod installation process. See File/Full Details for more info.
Halo Mod Installer
by Iron Arab
IMPORTANT: IN ORDER FOR THIS INSTALLER TO RUN ON YOUR PC, YOU MUST INSTALL MICROSOFT .NET FRAMEWORK SDK 2.0, A LINK IS PROVIDED BELOW
IF FOR ANY REASON THE ABOVE FRAMEWORK IS NOT COMPATIBLE WITH YOUR PC, OR THE LINK IS BROKEN, YOU CAN GO TO MICROSOFT.COM AND SEARCH MICROSOFT .NET FRAMEWORK SDK 2.0 TO FIND IT
This installer installs Halo Trial and Halo PC mods. This is the first release of my Mod Installer so it is only capable of installing mods that are modified versions of the bloodgulch.map file. For you noobs that means that if the mod you extracted out of the .zip or .rar file isn't called bloodgulch.map, then you will not be able to use this installer.
How to Use:
This installer is pretty self-explanatory. Clicking the Browse button allows you to choose a mod file to install into your game. After you have chosen a file, simply click the install button, and it will automatically make a backup of your original bloodgulch.map file, and install the modded file. If you wish to return your game to normal, simply click the uninstall button, and the modded file will be deleted, and the original file will be restored.