I think you want a good OFFLINE gps system.
I have dabbled with TREKBUDDY when I went groping around Sri Lanka (Motorbike first and a second trip with a 4x4), Indonesia (foot) and bits of Malaysia (foot)
It uses jpeg tiles derived off online mapping systems like googlemap, Microsoft maps etc. The maps are downloaded offline by way of progs like Mobile Atlas Creator (MOBAC), then were loaded into my Blackberry 9000.
The positive of this, I assumed was that if I wandered into an area devoid of telecoms coverage, I can depend on the stored data to move around....works.
Isnt OziExplore one of these?
Warmest Regards to all those who live the dream
U
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