I put the CD in, usual start menus come up, auran full screen video then crash! not responding!:'( I've had this trouble before and last time I just replaced the 'mainassests.tdx' with an older copy that i made then it worked fine..apart from loosing a number of routes But what i can't understand is that i used trainz 2 days ago and was fine, haven't downloaded anything new, then all of a sudden it won't work. I have tried leaving it to see if it will start up again but no luck, endless reboots... etc. i don't want to load up the old mainassests file I had as I am half way through modeling a large route which I have put many hours work into, so i don't want to loose it whatever happends. Any halp please? Endless thanks to any segestions and help