i do got that adobe s.o.b but i had to turn to basic to run the manual but now i cant run dos on any (platform) if you will/ any way its duke nuken 3d sorry for not clearing that up before
you know what i mean but still the box pops up switches to full screan (sorry for misspelling) then the freking thing just closes and f**k all happens
You shouldn't have to change your Win7 flavour from Ultimate to basic to be able to open a PDF file. And there is no DOS in Windows any more. There was no DOS in XP, no DOS in Vista and there is no DOS in Win7. There is a command prompt but no full DOS.
The GOG installers come with DOSBox for games which ran in DOS. DOSBox is an emulator for DOS. All you should need to do to play is run the executable that got installed with the GOG version of Duke Nukem 3D.
You are either going to have to give us screenshots and error messages to show us what you are doing and why you can't open the manual/game or the only advice we can give is to raise a support ticket with GOG support.