Preferences as XML File?, Don't Use Windows Installer?

Can’t @art ouette just use specialFolder.ApplicationSupport/[his app name]/[prefs file] to save his preferences file on all targets? I do this on OSX but save as specialFolder.ApplicationSupport/[bundleID]/[prefs file] and I write my prefs file when I first run my application so I don’t have to worry about installing it or putting it somewhere special when I install my app.