Some information about Flan's Titan Pack Mod 1.7.2/1.6.4 that you can need before installing

How to install Flan’s Titan Pack Mod for Minecraft:

Download and install Simple Parts Pack To install a custom content pack, Download the file below. You should have downloaded a zip file with a folder and probably a readme inside. If the /minecraft/Flan/ directory does not exist, create it. It should automatically be created when you run Minecraft with Flan’s mod installed. Copy the folder into the /minecraft/Flan/ directory. Run Minecraft, and hopefully everything will work out nicely. ...

Detail and Download here : Minecraft mods 1.7.5/1.7.2/1.6.4