Joystick & buttons map on CPO

[MameMe]

I've put together a .PSD file that I will eventually get printed out at some graphics shop for my control panel overlay.  But before I send it to the printer shop, I want to mark the spots on the overlay where the buttons & joysticks should go.  Basically "X" marks the spot.

Has anyone done this before?  Any suggestions on how this can be accomplished, while making sure everything is lined up perfectly?

[patrickl]

Well, I printed my CPO myself, but I simply put marks where I wanted to dril (center of the holes). Not much to it really.

Actually as it turned out, I drilled out the holes before putting on the CPO. I just poked a sharp point through the CPO to mark the drill points. I then later cut out the holes through the CPO with a sharp knife.