I don't have the II+, but I do have two other Garmin GPS.

Both have the accesory/power cable as one piece.

Garmin offers a piece of software called MapSource. There a couple of different versions of it. It allows you to download different mapsets into your GPS.

Here is a link to the manual for the II+
http://www.garmin.com/products/manua...t=010-00128-00