Slakah also released a mod that does that called I Need Fire.
Though it looks like it uses TomTom for way points so I'm not sure if it will work for you since you use Cartographer
http://www.wowinterface.com/download...INeedFire.html
Fire! heh heh Fire!!
Edit: Though it looks like it uses TomTom for way points so I'm not sure if it will work for you since you use Cartographer