1. Internet Explorer
Open the Google Map site on the map you want to save,
Hit the Print Screen key on your keyboard (upper right corner of your keyboard.),
Press Start -> Programs -> Accessories -> Paint
When Paint opens to a new canvas; press ctrl V which will paste the screen shot to Paint;
Use the select tool to crop the map from the screen image,
Copy the cropped map, paste to a new canvas, save as a jpeg

2. Use Firefox


Google Maps Hack: How To Save Large Maps - Celebrity bloopers here