I think there is a greater demand for this than is already apparent. Think about being able to put your own advertisments on trackside billboards in racing games, or being able to retexture the clothing of a character in a fighting game. I'm trying to work on a project to reskin Quantum Redshift with some wireframe/Tron/Rez/psychadelic textures, and the files are not compressed inside a disk image like in Halo. However, these files appear to deviate from the DDS file specification to some degree because I cannot open them with any standard tools. They obviously are not corrupt since they work in game, but I wonder if they have omitted file header information and load texture data directly to a surface or something. There are some other tools besides the nVidia Photoshop Plugin (which should be in /photoshop/plugins/fileformats). I've also tried the nVidia Windows Explorer DDS Thumbnail extension, DirectTex Tool from DX9b SDK, and the ATi Compressonator tool (which didn't work at all, even with the handful of textures in Quantum Redshift that do apparently conform to DDS file spec and thus open ok). I wonder if some of the Halo texture modification tools couldn't be modified to open nonstandard DDS files?