How to connect two points on a map not as the crow line?

[Flashmap]

We are engaged in development flash maps for websites. (http://www.fla-shop.com)
Now we try to develop new function - display of routes of movement between cities.
(for example for show of a route of travel, or for the avia companies ).
Hot points on our maps are set by coordinates.
A question in how to make a line between points not a straight line, and on an arch?

[Sgaspar11]

Hmm, I see what you are saying, you want to show it sort of like how an airplane travels across the earth, since the earth is round its quick to fly from point A to B in an arch v a straight line.

I've never done this before, but maybe this will get you in the right direction! Let us know how it turns out.

http://www.flashperfection.com/tutor...nes-22982.html