Set right click on a toggle

I enjoy MMO game like WoW, and with GW2 around the corner it is my next game. The one problem I have is mouse turning, where you right click to lock the camera and move the mouse to turn. Just like a third person action game, such as Kingdoms of Amular.

However I have trouble holding down right click for long, my finger will always release just enough for the right click to stop. I could just right click whenever I have to turn, but it is much easier for me to always have mouse turning engaged like a third person action game.

Is there any way to set it up so when you press right click once, the computer acts as though you are holding right click down until the actual right click is pressed again? I am using Windows 7 and a logitech g700 mouse if that helps.

I have googled this to death, so any help is greatly appreciated.