Here's an addon i made for iGuidance v3 (and perhaps others). Basically its a script that will take LAT and LON coordinates you enter as parameters and send them to iG for navigation. I also added an option to auto-save the coordinates to your favorites list by adding the name of the entry as a third parameter. May seem redundant to some but there are people who've requested it for use with POI databases n such. Anyway, here it is

http://www.sonicxtacy.com/poinav.rar

This plugin is NOT limited to road runner but works best with it.