Hey All. Very Very new at this so please be gentle with me. My nephews do most of the using but I am trying to get this fixed. Downloaded the Blue Comet Add On. That was successful but when I tried to install it I got the error message "An existing trainsz has been detected but it is an older Trainz version....." and went on to tell me to go to the Auran and get the approriate Trainz updates. My question is how do I tell which ones are appropriate and apply. I tried to a couple but the installer told me they don't apply. :'( . Help me please help my nephews. TIA. Slim