Well, it's been a while. After I registered the MPQDraft project on SourceForge last April 1, I procrastinated for so many months that many people suspected it was an April fools' prank; however, the only prank that was intended was the fact that it wasn't a prank. One year after then, I finally got around to posting the complete patching code, although I'm only just now getting the last of the GUI code uploaded. This is to say that the code on SourceForge is now complete, and MPQDraft is now fully open-source.
The MPQDraft project
Binary download page
Web-based source code browser
Instructions on downloading the source code
The OSS license it's licensed under