sorry, I made a mistake in my last post, the xterm menu shortcut doesn't use * it uses .

Stolen from another thread you make them this way.

Go into xTerminal.
Select main Menu -> Tools -> Settings
Click on Toolbar Shortcut
Add (New) a new shortcut
Title = Sudo (or whatever you want to name it)
Value = s . u . d . o . KP_Space . g . a . i . n . r . o . o . t . KP_Enter

This works great to launch any number of Xterm apps and such.

-John