1. Open TexMod
2. Run Texmod in "Package Mode"
3. Click on the foler on Target Application, hit browse, then select "DmC-DevilMayCry.exe" in the directory at Steam\steamapps\common\DmC Devil May Cry
4. Once you've selected the executible, click on the folder in the middle, hit browse, then click on the TPF files you want to use. 
5. Press "Run" and your mods will load in-game.
6. Enjoy!

-Nyx