Perhaps it would help if I went step by step of what I'm doing.
1. Open uniform_wan.iff with 3dm tool and extract the 64X64 RGBA logo using export, as a DDS file, keeping the original numerical name given.
2. Having created a new image in photoshop with transparent background, 64X64, my new Expos logo planted in the middle, I use "save as" and selesct the file I just exported from 3dm. I choose "DXT5 ARGB 8pp interpolated alpha" and "generate mip maps" is selected.
3. Having saved over the original, I then import back into 3dm. I am asked something in Chinese, I hit what would seem to be "YES" when the popup pops up, then get that exception error. Parameter is not valid.
That's what happens when I follow what's on that page. I use the 3dm tool for all the other logos fine, just this goofy one. It's strange, my attempts at cyberfaces are coming along better than figuring this thing out.