AVR-Chat

Hi,
I have thought of an idea for tracking packages using GPS.My father
owns a transport company and we are thinking of implementing it for
our company.

Here is the idea( which i also sent to NASA design contest) with the
block diagram-
http://www.createthefuturecontest.com/pages/view/entriesdetail.html?entryID=1044


Basically i need suggestions how individual packages be tracked so
that it turns out to be a professional solution.

Regards
Spelter