No, not out of the box. May be possible if you buy some other stuff.
Too easy:
http://www.amazon.com/Delorme-Earthmate-PN...C/ref=pd_cp_e_1
Everthing in the box, or available from DeLorme, so there is no third party stuff to buy.
Is that Delorme really a good deal. The GF and I am looking for something but know really nothing about GPS. Can that PN20 download all the cache info?