Click to download and run the game once to ensure all base files are generated. Adding Mods
: After Forge is installed, a "mods" folder will be created in your Minecraft directory (usually %appdata%\.minecraft ). Place your downloaded mod files (.jar or .zip) directly into this folder.
: Download the version of Minecraft Forge specifically for 1.7.2. Run the installer and select "Install client."
Once the base version is installed, you need a mod loader to run additional content:
: In the Minecraft Launcher, select the "Forge" profile for 1.7.2 from the version menu and click Play .
To play Minecraft version 1.7.2 with mods, the most reliable method is to use the official Minecraft Launcher to set up the base version and then install a mod loader like Forge. How to Install Minecraft 1.7.2