Help "combining" scripts.

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I've got a question concerning the "combining" of two scripts.  I think that's the right word anyway.
So, i'm using the Variable Dash script (http://www.pockethouse.com/rpgvx/scripts/variabledash.txt) to make my character walk slower when the dash button is being pressed.
I'm also using a Stealth script (http://www.rpgrevolution.com/forums/index.php?showtopic=15208&hl=cmpsr2000).
What I want, is when you are walking (when the dash button is being held) the guards cannot see you, even if you are in their line of vision.  Anybody know how to do that?

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*Bump*