Hi there. I'm currently working on a modernesque TF2 trade map. I've added in some models within Hammer, and I assume they are from Half-Life 2. I'm at the stage now, however, where when I load up the map, they will appear invisible in game, and I'm not sure where to go or what I should do to pack these files in with the map (most of the groundwork for the map is done, I'm looking to PakRat a beta now). Is what I'm trying to do possible? If so, what methods should I use in order to let me import these HL2 models into my map?