I think I have that cd its a couple years old
as for the cable I bought some ends from a guy
and made several, one power cord for the boat,car
and a serial/power cable for the car and a wall wart powered serial one
I paid about 9.00 for the raw connector
so cheap I bought 2 , they have the GARMIN
plug round 4 pin plug and 6 foot of wire pigtails, fits II, III, V and several others
adding a cig plug is easy, the serial plug is only a little bit harder.