I believe you need to have a your graphics converted to a specific format (I don't know it) in order to access them using Core3. I haven't tried customizing too much of the core3 stuff but from my understanding you can only change the button graphics, and even that isn't the easiest.

Your best luck would be to contact a GUI company (that has Core3 graphics) and ask them what is required to get your current interface converted to be used on Core3 projects.

Lites, why are you using Studio? Like bambam I installed it and played with it but was so confused as to how it worked closed it and opened Simpl and VTPro and had my system programmed in a couple hours.