My recent remake of my campaign world (Triterra) will be based on a 20 mile hex grid. I already have a number of maps set up that I would like to link the world map to, but have the problem that some link areas overlap. I was wondering if it would be possible to "upgrade" the Hyperlink function to allow the user to make link borders in polygon shapes (like hexagons) or even have a Hyperlink function attached to a symbol (like Flash).

Would that be difficult?