I know some of these CD's are hard to find.
I just wanted to let everyone know, I've listed one on e-bay in case anyone is looking for one.

I just fixed a problem that I've heard others mention.
I'll be driving along the highway, and poof, the GPS puts me out in the woods hundreds of yards away, then poof, puts me back on the highway.

I removed the cover and swabbed the laser lens with alcohol on a Q-tip.
Exercised the spring loaded lens a bit, blew the housing out with compressed air, and it fixed that problem.