HaloMods "Classic" Read-only Archive

I', having trouble skinning stuff with PS. Every time I get done skinning and I try to inject it back into the object it says that it must be DXT1. When I save it as a DDS file I clicked on DXT1 and saved it but it still dosen't work. Anyone know how to fix this?

look at the raw data editor, where you inject it, near the top it says what type of file it is, dxt 1, 2, 3 ,4 ,5. thats what you have to save it as. when it says it needs to be a dxt 1 doesnt mean thats what it has to be.