The nvidia-texture-tools are now in debian unstable[1]. If you need any help with creating the package for 0ad drop me a message and I will see how I can be of assistance to you.
[1] http://packages.debian.org/source/sid/nvidia-texture-tools -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org