How do i create a icon for a wine program

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http://ubuntuforums.org – Hey i installed the windows chemsketch software in wine and it works fine :D. now i want to create a icon like for the other applications. I use gnome3 and already created a shell which perfecly starts the application. but i realy dont have an idea how to start it easily with an icon. Hope you guys can help :D (Hardware)