RAILWORKS Train Simulator 2012 Deluxe Update 4 SKIDROW

- Fixes \'PhysX Failed To Initialise\' when SSE not present (AthlonXP CPU)
- Legacy screenshots are no longer whispy
- AI, player, particles and camera updates are synchronised
- FPS Limit at 30 and 60 offered as command line options
- Punch-through on HSC gantries fixed on Legacy
- Crawling AI from scenario editor problems resolved
- Added OnCameraEnter and OnCameraLeave for engine/wagon scripts
- Depth of Field not turned on after losing full screen
- SD40-2 sits on rails
- Class 55 cab gaps fixed

thanks to mimi and SKIDROW as always!