The ModPack is a collection of player modifications to the AI that are known to be compatible with each other, along with several new races including the Rage. The mods are primarily improvements to the AI to make it more challenging. I highly recommend installing it.
To find it, go back up to the Shrapnel Games' Forums, then go into the Scenario/Mod Archive. Select Space Empires AI Races/Shipsets (or something like that). Look down the list until you find the TDM ModPack 1.70 posted by Mephisto. Download it and follow the instructions that come with it to install it.
In case you are wondering, the "TDM" stands for Tampa Gamer, Daynarr and Mephisto, who are the three guys that handle putting the ModPack together. They do an excellent job.
