SendMap it’s a software for uploading your maps to the GPS device. Now it uses the official Garmin USB driver. First, you should install the USB driver for your GPS (download the USB driver from Garmin’s site). If your GPS is RS based only OR your GPS is visible as USB-storage drive, you don’t have to install this USB driver. The RS interface will work fine as well as USB-storage drives do not require any additional driver.
To visit cGPSmapper website and download free software CLICK HERE. Then scroll down till you see “sendMap” and chose the right version (Windows, Linux, Mac, Pocket PC) or the PRO (USD 30).