Hi: I am brand new to this whole idea but I have just purchased a Fujitzu U810 ultra mobile laptop with both bluetooth and USB capabilities and I wish to use it as my mobile GPS. I have seen the i.Trek M7 WBT-300 and HoluxGPSlim 236 discussions and will problably choose one of those units. Do you have a recommendation as to what mapping software I will need, the U810 is running on Vista. Thank you, holodoc