I've had a 6700 - managed to brick it ... rather dunk it ... went swimming with it in my short pocket !
anyway .. just try
http://forum.ppcgeeks.com/showthread.php?t=25027 Not sure ... not tested - but just my penny for thought.
But with the 6800 I've got a location even in India ... which is no where near the AGPS positions.. You can check up my post on
http://www.ashoksoft.blogspot.com maybe the same settings thro QPST might help..
cheers
karki