Replacing textures in unpacked .drm files

[FakePersonality]

Hi all

So, I unpacked the first bigfile, and did a security cam retex, now I have to replace it... But I have no idea how.
I used gibbed's tools for unpacking, and tried using the DRMedit module to replace the texture, but it doesn't seem to be capable.
Anyone knows how to do this?

(Btw - creds to the devs for making deus ex. It's the best game I ever played, no jk. I grew up on consolized gaming and this was refreshing. You guys made me sure about my career choice in game dev.)