Customizing my tab/f4 menu

So for about a week now I have been looking all over Google for a way to customize my f4 and/or tab menu so they’re unique in a way. I have a pretty basic understanding of lua and would absolutely love to learn how to do this… Any help?

http://maurits.tv/data/garrysmod/wiki/wiki.garrysmod.com/indexe102.html - Sightly outdated but should help still.

Customize? Or make a new one? If you want to customize the F4 menu you should be able to find it in the DarkRP folder (Assuming that is what it is for). Otherwise the reply above me is what you need.