REZ Weapon Textures

Upon extracting the REZ's from Crossfire using a tool posted here, a lot of the PNGs are unreadable by windows. Is there a way for me to convert them?

- - - Updated - - -


Here is a screenshot of the issue

How would I do this, I see no decompression option in 7zip.

this still didnt work, neither did the extraction of the pngs using 7z either. they are still unreadable