If you are looking for a GPS application that will help you plot where and how far you walk, for exercise or other reasons, than those are out there. And I personally don't understand why having an internal GPS would cause an issue for that, unless maybe you want to spend extra cash when you don't need to.
I know this one works as I have downloaded the trial and checked it out before...
http://www.gpstuner.com/overview.htm
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