Hello Sc2 mapster!
I made a tutorial on how to convert .DDS files into .PNG files in bulk.
Hoping this will be of use for any modders out there wanting to re-use WC3 and WoW art assets in .DDS format.
Nice tutorial! The question on how to create .dds files comes up once in a while, so this should help.
Alternatively, if someone can't use Photoshop for some reason, Aorta works well for batch-conversion as well. Be sure to disable "Generate Mipmaps" when using that program.