I have read online and seen screenshots of people that have created their own custom radial mouse menus to execute all kinds of different commands. How do I do that?
I could post an elaborate answer which would be basically ripping off other people's work, but instead I'll just show you a link to a great tutorial. Adding a radial menu.
If you need to know what commands to use et cetera just let me know what you want to do and I (or someone else here) will help you further.