This is a program that functions like Opera's Mouse Gestures and can be used for any application (ie. bring mouse gestures to Internet Explorer, Netscape, etc). Very customizable and best of all it's free.
http://www.tcbnetworks.com/strokeit/

Hint: If you set the program to draw gestures using your mouse wheel (the same as the middle button) you should add XaraX to the custom program's list and tell it to Disable gestures for this application, otherwise Xara's mouse wheel panning will not work.