HaloMods "Classic" Read-only Archive

I followed PaintballPyro555's tutorial on how to edit lightmaps, but I ran into some trouble.
I edited the bitmaps (as jpegs), and converted them to dds format (DXT1), but HMT (Mac) says they need to be DXT1, which that already are. I used SquishDDS as a converter, any advice on how to fix this?

at the moment it is unable to edit lightmaps on a macintosh, I know, it sucks.
My advice on how to edit lightmaps on a macintosh, befriend someone who has a pc and make them do it

But why? Everything looks like it works, is the only problem the DDS format?

Hmmmm. Use Eschaton for bitmap importing, see if that allows you to get anywhere.

I'm on my windows computer right now, I'll just do it this way.
Thanks for the help!