The first problem would be that you need the ability to click - which means you need to add a mouse script, because by default the RM's have no mouse support.
If that mouse script has a support for dragging, you might be able to use that - but most probably you'll have to split the worldmap into several screens and click on arrow pictures to change to the next part.
And then you need to adapt the mouse script and the world map to your functions for the world map...
If you're new to RMs and game making, I suggest you start at the link in my signature, and then make a small test project without mouse just to learn the basics of the engine - adding a lot of scripts into your first game project can cause a lot of problems unless you already have a background in programming.