To embed a map into a property page go to Google map and enter an address and click on the link icon in the left top panel.
In the box that pops up, customize the size of the map if needed and copy the HTML under "Paste HTML to embed in website".
Paste it to the UDPA map field of the property...
...then add it to the property template. Be sure to choose to display it as HTML in the Property template and to apply it to all properties.
Removing the info bubble
Now sometimes you want to get rid of the annoying bubble which shows the address above the location marker.
To do so you need to find the part before the end of the code like "...&t=m&z=14&iwloc=A&output=embed"></iframe>". Just before the end of the quotation mark ater embed, add the following: &iwloc=B. Now you can enjoy a free bubble map.
More info on more advanced options: http://maps.google.com/help/maps/getmaps/plot-one.html.