Fallout new vegas windows 7 install problem

when i try to mount the 6,xxGB large .iso with DAEMON tools lite. it al goes well. but when i autoplay setup.exe i get a error!
the version of this file is not compatible with the windows version currently using. Please look up you system information if you’re running x86- or x64 version of the program. After that contact the releaser of this software
above is translated and not the real error i am running windows 7 build 7600 32 bits
4GB RAM, intel core 2 duo E8435
ati radeon 4850
what can i do to let this awesome new game work? plz help me
Answer #1
I guess you have to download another copy of the game.