Thank you for taking such an interest in my work.
When the pack is finished it will be made publicly available. Then I will make the brightmap addon. I have plans to assist Nevender'sDoom64 Retribution project with a set of textures and brightmaps after. If I survive all that work, and you are making a mod, I will let you know and we can see what I can do for you as far as textures are concerned. This will be way in the future though as I have the next year or more chock-a-block of texture work.