Walking street maps

I use iNav 4 and interested in map software more usable for walking than driving in US cities.

iGuidance 2009 now has pedestrian mode, something the previous iNav iGuidance 4 didn't have. Also Garmin Mobile PC has pedestrian mode. Are you going to be using it on an ultra-mobile PC while walking?

I have a Dell X51v pda I use when I don't want the bulk of my Fujitsu 1610. The PDA uses ms mobil 5.0 and has an SD slot. Will the new iNav 2009 work. From your review, it appears that I would need two different ungrades .