Macro to shift the selection to guideline

I am printer. My client always send me non marginable designs which i need to print. But designs dont have margin for cutting therefore i have to create margin by first creating guidlelines for example 5mm inside on all side of page then i have to strech the design inside the guideline so that printing wont cut when i was using cutting machine.

Thats why I want a macro to create a specific MM guideline inside the page on all 4 corner and on the same time to shift all my selected design to strech inside till my guideline.