Indeed, this is Windows, but I was using the Un*x solution as an example of an implemented solution, not as a espousal of its use.
The whole idea of the sudo command is that a prior list of users and programs is established by an Administrator; thereafter those users may execute the selected commands at a higher privilege. The list itself is not editable by normal users of course.
To the best of my knowledge, any variation of runas still requires a password to be entered. That's been stated here several times.
The code at the Sourceforge sudowin site seems ideal, according the the fairly ambitious description by its author, and I was just wondering if anyone else had any experience with it.