i dont think that this is even possible, due to having be forced to update after your every kil. Although i am probably wrong.
I know that there is an addon called Lightheaded that integrates WoWHead comments and links into your questlog. Using it paired with a fully loaded cartographer works wonders due to the ability to click the [32,32] coordinate link and have it give you a waypoint to run to. I know that greatly aided me last time i leveled a character to 70.
Hope it helps, you should be able to find it here.
Link to it below.
http://www.wowinterface.com/download...ghtHeaded.html
I highly recommend it.