Prox affecting code of GM script on installing

[ProxRocks]

does Greasemonkey simply download a .js file then run it locally after it is downloaded?

if so, bypassing Proxo "while" downloading that .js for it to be stored locally solves the problem, does it not?

let me ask it this way, is this Monkey-thing downloading the .js file ONCE, or over-and-over-and-over?