I've had 2010 for about a week now, and Im finding that it doesnt run very smoothly on my older PC. I've been involved with computers professionally for over 30 years now, and fully understand the relationships betwen CPU, Memory and Graphics speed. My guess is a nice duo core system running a 64bit OS would be the way to go, but it just isnt in the cards right now. I dont have a problem using older apps, as long as they run well and still have available addons. I see many users here have multiple versions of Trainz and Im wondering if perhaps I should pick up 2009 or maybe 2006, if still available, until at such time that i can build a new PC. All thoughts appreciated. Thank you and Happy New Year!