The installer on our website for Trainz 2009 is indeed the easiest way to get it installed for 2010. We've recently updated the software to force you to choose the location of your Trainz installation, where before it would look for a specific file name and install everything to a completely different location if that file wasn't found. This was a major headache for 2010 users to have to move everything and for users who bought a copy of Trainz from a distributor other than Auran, so this new version fixed a lot of problems.