If you are a developer, please build MegaGlest on your own and get in touch to contribute (or post your patches on the forums).
Explain.What OS?What Program are you using to extract them?
Have you opened it with 7zip File Manager, Or did you just right-click and go to 7-zip>extract file?I don't think it matters, but try both of those methods.
Try re-downloading the file
No there is nothing wrong with 7-zip, 7-zip works fine.Hmm......Why don't you uninstall 7-zip and then download the installer again.Is your computer 64-bit?
Hmm, try downloading another glest mod, and see if that works.
Then there is something wrong with the VBros Packs.Which one are you trying to unpack, does one of them work and not the other?
Oh come on, play Romans 2.1.