single auto-switching x86/x64 portable version

Have one portable-version download that contains both x86 and x64 versions of files (for the ~10 that seem to be different) and automatically uses whichever is appropriate to the system being run on. For example, PortableApps' version of Firefox is one of several programs they have that can do this. From that homepage, "Firefox Portable is a dual-mode 32-bit and 64-bit app, ensuring Firefox runs as fast as possible on every PC." This functionality would be fantastic for Fort too!