Well basically I download 3Ds Max and I try install it and it was blocked, and tried it more than one time, so I might want to try to install Blender. Also the reason why I want to try Google Sketchup is because I want to create the Bridges which is the Century/LAX/Aviation Bridge, that was used back in 1990's so I can import it to any of the programs like 3ds Max, Gmax, and Blender, so I decided on Blender, and I might be able to Export the model to Trainz, I heard the some of the users had use Google Sketchup and exported to any 3 of the programs and then Trainz, and sometimes users export Google Sketchup models to Trainz by using the RubyTMIX. Also I'm looking into creating a fictional route based on a model railroad layout, and a fictional light-rail based on book I read in the 5th grade which is "New Providence a changing cityscape" and it was the best book and I like how the setting was taking place it would be great, and it will take some time.