Successful upgrade of Vista
Today I upgraded my Vista build 53xx to a newer one using the in place upgrade method.
Just inserted my new DVD and run setup, after I entered my product key I could choose to upgrade the current Vista build, so that was what I did.
As you can see on the screenshot below Vista setup is upgrading my machine.
After a few reboots I got my login prompt again, I logged on my machine and the upgrade was completed successfully.
All my settings where kept and the installed applications worked as before.