Thanks for your reply, that makes sense now. A batch file to create a batch as you say! I'm not up on Python but can get by in maxscript so I'll give Python a look when I get some free time.
There are many ways, but the simplest (and least-featured) is good to get started with. 1. In the folder where your TGAs are, make a new TXT file. 2. Rename it something like DXT1.BAT 3. Edit it like this:"C:\Program Files\NVIDIA Corporation\NVIDIA Texture Tools 2\bin\nvcompress.exe" -color whatever.tga -bc1"C:\Program…