Title: How to make a TF2 mod without loading TF2 items/inventory?

Hi everyone, I’m working on a Team Fortress 2007 project based on the Source 2013 multiplayer engine. The problem is that when I launch the mod, it automatically loads all TF2 items from the main game, and I don’t want that. I want my mod to be completely independent, with no TF2 weapons, hats, or inventory showing up. I know it has something to do with how Source handles paths and VPKs, but I’m not sure how to set up a standalone mod properly.

Can please someone explain me how can I fix it?