scripting infoage?

[chupchup]

I have done a search and no-one seems to have answered the question: how do I set infoage in a script?  I know that the Knowsabout and Reveal commands give a script editor basic control of 'who knows what about who' but nothing like the precise control available through the mission editor on the add unit screen.
More specifically; if I use
_dude = Createunit  "whatever"
in a script and I want the unit to have an infoage that updates their map position every
 ~ _x,
is there a better way than using
Player Reveal _Dude
Thanx