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These settings are for an 800*600 frame
Open your Project's Properties>>Inventory TAB
Set it for a Static inventory--[Leave the check-box blank]
Set your vertical spacing for 523-[aprox.]
Adjust the horizontal or leave as is at 10--[This is the spacing between your icons]
Done.

I want to Thank jack8135 for sharing that with me..That is just epic..In all of the time I've had AM..I never tried that..!?
I've messed with it..but not bring it that far down..to give me my inventory at the bottom..
So simple, yet very effective..

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** The only thing I would advise against;
Using the Message feature..be it by script or thru the Action tab..Use TEXT instead**