While editing login screens I decided I would like to remove the ESRB rating and the WoW logo in the upper left corner altogether. I tried using BLP2toTGA to edit the images and make them transparent [using GIMP] but they error while attempting to convert them back to BLP files. I also attempted to just throw the TGA file into an MPQ file and rename it via MyWarcraftStudio which results in a big green box on my login screen.
My questions are:
1) Is there a way to create a transparent BLP file?
or
2) Is there another file I can sub in these images' place to make them 'disappear'.