Here i will show you how to modify your radiomenu. I was looking for a way to create something similar like the Commandmenu in CS1.6.
Executing commands via the radiomenu however is very limited since a lot of commands (like "exec", "rcon", "toggle") are not working. I have not tried everything, so its up to you.

1) Open the file

...\csgo\resource\ui\radiopanel.txt

2) Edit blocks as you like

"redcrosshair" // something you can remember
{
  // position in the menu and hotkey to use
    "hotkey"   "1"
  // the name of the entry in the menu
    "label"    "Red Crosshair" 
  // command to execute
    "cmd"      "cl_crosshaircolor_b 0; cl_crosshaircolor_g 0; cl_crosshaircolor_r 250" 
}

Here is the file i used when i took the screenshot:
radiopanel.txt

My english is pretty poor but i wanted to share this information with you. Ask, if you don't understand something and tell me what i could improve.