TexMod is an older tool that injects .tpf (Texture Package Format) files. It usually requires registry keys.
If you want more flexibility without a permanent install, use these standalone tools: TexMod (Archive Version):
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✅ No registry edits or Steam Library needed. Works perfectly portably.
Since portable versions don't rely on a fixed registry path, ReShade is the easiest mod to "carry" with your game. Download the installer.
If your game is version 1.0 (no updates), many mods will fail. Update your portable copy to v1.1.748.0 (the final patch).