Welcome to Seven Forums dmutantx. Are you sure that is his theme, and not just custom folder icons? paulodelvalle's deviantART gallery
Have him navigate to: C:\windows\Resources\Themes
His theme should be there, if you both have the same bit OS (x64 or x86), he can copy the theme folder and .theme files for you. make sure you get both, IE:
I suspect he has just customized his folder icons at some point.