So I got the game after i noticed it said windows 7 supported however Im on Windows 7 64 bit and it wont install when i try to run the setup_Duke3D.exe installer, it gives me a box saying.

"The version of this file is not compatible with the version of Windows your running. Check your computers system informationto see wheather you need an x86(32 bit) or x64(64 bit) version of the program, and then contact the software provider."

Anyone have any ideas? Thanks for any help

Hmm that is strange. I installed the game 2 weeks ago on my new 64 bit Windows 7 without any problems. Have you checked if the file downloaded correctly? That's the only idea I have off the top of my hat.