Just an update with my trials and sometimes failures of apt-get.!

It works!
Comment out everything except the stable, unstable and testing trees.

This is the first time I did an upgrade without breaking my install.

Also, use the apt-get -s (whatever you want to do ) to simulate what apt-get will do and check to make sure it is not going to remove any system packages you need or other packages you want.

Pretty Kool!
Thanks to all for helping me get a better understanding of this rebust command.
paul