I don't think we have any other users of the windows 7 64-bit platform yet, at least none I know of. Are you able to run other large mods you download from this site, such as Fall From Heaven? If so, then I don't think the platform is the problem.
It may be that a native non-English installation is the problem. The installer is supposed to create a directory, "My Documents\My Games\Beyond The Sword\Dune Wars\UserSettings", and write a bunch of ini files there. On your system, I suppose the exact name of "My Documents" and "My Games" will be different. Does this directory "Dune Wars\UserSettings" exist somewhere in your local My Games directory? One of the mods which is inside Dune Wars is called BUG, "BTS Unaltered Gameplay", and that has had some issues reported before with non-English characters. We fixed one instance of this in 1.7.1 but possibly there are other instances of the same problem.