Thanks to all who have provided assistance. It is much appreciated.

I ended up buying the 2010 DVDs from Tischer. I had so many problems with my burned 2006 DVD that I just did not want to deal with that again. I had also bought the v32 software CD from Tischer, but it was cracked when I opened it. I live only a few miles from them, so I took it back for replacement. The others they had in stock were also cracked and they would not be getting any in until today.

Since I already had the 2010 maps in hand, I decided to try the software download. On the third try it worked, after the first two discs (a DVD-R and an inferior CD-R) did not. As I had read in another thread, using a quality disc seems to be crucial. I love the new features and graphics. It's as if I have a new nav unit altogether!