basically: the installer doesnt like your os
EDIT: which is weird since its relatively new and specifications include windows vista and 7
EDIT2:
1) copy the entirety of the files in the game disc image to somewhere in your local hard disk.
2) go here : http://area-zero.net/support/faq.htm#install_01
3) download
4) extract 'install.bat' (winrar would work)
5) overwrite the existing install.bat in the new folder you just created (containing the game files) (where ever that 'install.bat' is, i dont know).
6) install the game by running 'install.exe' after you overwritten the 'install.bat' (it should be in the same place as 'install.bat')
7) blame 64-bit architecture