The below tutorial was posted to the Wayfinder Access mailing list. It is written by Ibrahim Gucukoglu and is being posted with his permission.

For those of you who are interested or own a G66+ gps receiver, here is a brief tutorial on how to install the AGPS database to the unit. Despite the popular notion that this process is inaccessible or at least very difficult will be dispelled shortly:
You will need to have the following to hand. The gps receiver, USB cable and software disk all of which should have come in the packaging.

Firstly, we need to install the driver for the USB device. Insert the cd in to an XP or Vista computer. The instructions given here are for XP as that is what I use. The CD should automatically start, if it doesn’t, find the drive in which the cd is located in my computer and press enter. You will be asked whether you want to enable active content, you should answer Yes to any prompts that appear. A web interface will appear and from this you should choose “software” then “driver”. Select run in both dialog boxes, you’ll be guided through the installation of the driver by the driver installation wizard which may or may not depending on your hardware settings require you to click “continue anyway” when the hardware wizard interface appears.

Installation of the driver now complete, connect the gps receiver to the USB port and follow the found new hardware wizard to complete installation. Make sure you here that the found new hardware balloon appears indicating successful installation. Now we can proceed to installing the software AGPS tool.

Returning to the web interface, enter on “AGPS Application” and follow the instructions. You will be prompted where to install the program and if necessary, the ULA for the framework will appear, you must install this by clicking “accept” and following through the installation to completion.

Finally, the AGPS application itself which is extremely simple to use. An icon on your desktop (unless you chose not to create one) will launch the program. There are three tabs similar to those in a windows multiple page dialog box. The one we concern ourselves with is the AGPS tab. Firstly, tab round to the combo box for selecting baud rate and select 38400 which is the baud rate of this receiver. Click scan and if you use your reviewing cursor, you’ll find a status line indicating that the gps was found on com X and the download button should enable. Click download, you’ll be asked if you are connected to the internet, if you are click OK and the downloading of the AGPS database will begin. When downloading is complete, you’ll be told that writing will commence, click OK and wait for writing operation to be complete.

Congratulations you have just written the AGPS database to the receiver, I trust this tutorial will help those either planning on buying or who already bought one of these Excellent little receivers and I’m happy to take questions.