I just recieved a VisorEdge from a friend who has had it about 2-3 years. It currently has Palm OS 3.5.2H2.0 - IS it possible for my to upgrade to OS 4 or am I stuck until I can afford another unit?

Your stuck at that system software. Handspring sold their devices cheaper because they didn't put flash rom in the units.

thanks for the info my friend!