Windows Media Player doesn't support Flash. Some browsers have the Flash plugin built in which simply means that they don't have to go to Macromedia's site to get the plug-in. I guess you could say if it's already installed, the user will not have to "Do something". Hope this answers your question. BTW don't worry too much about browser compatibility. The plugin is very small and shouldn't be too much of a hassle for the user to get if they don't have it, especially if they're using IE (Activex controls will automatically install the plugin without having to download, save, install and restarting the browser as Netscape browsers will have to do). -SanV