Insusurro

The .texture just looks like it is a .dds with a header that points to where it goes. You should be able to create a 32x32 .dds image, grab the header from the .texture file your replacing with a hex editor, and then paste that header onto the .dds with the editor. Then just rename the .dds to the .texture your replacing. Haven't tried it yet, so might not work.