I have installed TRS2006 Trainz Railways Build 3337, on 2 Vista OS PC's, and on one Windows7 OS PC.
I turn the antivurus off, disable the firewall, turn off the UAC (and keep it off permanently), say yes to everything trainz wants (ie: install DirectX, and NetWhatEverItIs) yes yes yes to every notice that pops up .... and it installs fine. You must be conncted to the internet, during installization, while your AV and firewall are disabled.
I have Norton AV and I make 4 Allowable Exceptions Program rules for: TC.exe, TRS2006.exe, TC-CMP, TRS2006 CMP
I set my AV scans to exclude scanning of Auran/TRS2006/bin/local
Your bin file is where you should be launching from.
How full does your PC Disk show is still free, before, and after install ?
I just love TRS2006, (MSTS2 broke my heart), and I am chompin' at the bit for 09/10, or the next build.