I too got Trainz for xmas.  Sim 2010 Engineers Edition Deluxe.  I really had no trouble installing, but then I tried to do the patch.  The files DL'ed, but I got an error saying it could not open the DL'ed file...paraphrasing here.  Also, I tried to run one of the senarios and the controls worked at first and then went haywire.  Throttle had a mind of it's own and would not go to stop.  I'm running an AMD 64 bit Quad with 6 Gig and a Radeon 4870 X2.  Have had no problems before.  Any hints will be much appreciated.