I've got the 188C

Get the equipment/cable to hook it up to your computer, and a blank card. Then get the Hot Spots CD.

Hook your unit up to the computer, run the computer program, and download the maps you want to your blank card that's in your unit.

Computer cable:http://www.gpsdiscount.com/products/index.html?a=238
Blank card: http://www.gpsdiscount.com/products/index.html?a=239
CD: http://www.reedssports.com/product/p...etail&_id=5203

-OR-

Hot Spots East v5 pre-loaded card: http://www.tigergps.com/gafihotspprd.html
(discontinued - may have to watch eBay for a while)

If he doesn't have any luck with it and wants to sell it, let me know - I wouldn't mind having another 188c - great unit!