I recently purchased a BlackJack II from AT&T for personal use. One of the things I liked about it aside from the ability to get email and such on the road is the GPS embedded in it. I was saddened to find out that by default the GPS only worked with Telenav. I don't want to pay for even more services so I went out on the great old World Wide Web and found MoDaCo Smart phone GPS Activator. It's a handy little program that replaces the default GPS driver with a driver that allows any program (say Google Maps Mobile or Live Search.) to use the GPS unit via COM4.
There are a few ways to get this program on to your phone.
1) Direct via the phones browser. (http://modaco.com/gpsactivatorbj2)
2) Installing via a CAB file on the Handset (http://content.modaco.net/MoDaCo.SmartphoneGPSActivator.COM4.CAB)
3) Or installing it via a PC. (http://content.modaco.net/Setup.MoDaCo.SmartphoneGPSActivator.COM4.EXE)
I tried the first option on my phone, but it didn't work correctly, so I had to go with option number two. I downloaded the CAB file to my desktop and dropped it into my phone via the USB cable that came with.
To install via the CAB file once its on the phone go to Start, Applications, File Explorer, Then go to the folder where you put the CAB file and click on it to install the file.