I need the infocus LP 500 projector driver

Here is the InFocus Site pertaining to your projector.
There usually aren't drivers for projectors, When you connect a projector to your computer Windows,
(assuming that is what you are using) see's it as another monitor. Start the computer with the projector plugged in to the second graphics port. Right click the desktop/properties go to settings tab. On the second monitor adjust the resolution to whatever the native res is on the projector is. That should do it.
Post back with more details if you need more.