How to install *.exe with OSX terminal (Vray for Maya Demo)

Vray as example:

1. Downlaod the vray_demo_150SP1_maya2011_leopard_x64.rar file on the Desktop (or what ever is most current version, note 64bit version will not show Vray render window when rendering!!! If you want to see it, pick 32bit version)
2. Double click to unrar/unzip
3. Open a terminal (Go>Utilities>Terminal)
4. Type "chmod +x " (notice after x is space) and drag the file "vray_demo_150SP1_maya2011_leopard_x64.exe" file form the desktop in the Terminal (the command should look like: chmod +x /Users/username/Desktop/vray_demo_150SP1_maya2011_leopard_x64.exe) press enter.
5. Then type "sudo " (notice after sudo is space) and drag the file "vray_demo_150SP1_maya2011_leopard_x64.exe" again (the command should look like: sudo /Users/username/Desktop/vray_demo_150SP1_maya2011_leopard_x64.exe) press enter.
6. Follow the instructions of the installer
7. It will ask do you want to install Vray for Maya + Standalone or only standalone. Pick standalone only.