I created that short cut and in the Target field entered various resolution examples after the original command line, and the game would launch according to whatever I entered. The biggest mistake I was making is that I wasn't adding a space at the end of the original prompt before adding any additional command's. The current screen resolution I run on my main monitor is 1280 x 768.
I think I might be in the "Not all older machines support Unity trees, they are quite demanding on the graphics" category that you mentioned, because even after being windowed in lower resolutions, I'm still having the same issues loading 3 of the maps. Whats funny is if I take off and do a 180, I can fly around the perimeter of the Two Towers map as long as no tree's are visible.... lol
I'm still very happy with the sim and the 3 maps I can play, and would consider it one of the best $5 bill's I've ever spent. In the very near future I'm going to be getting a new machine, so I'll enjoy what I can for now and not worry too much about it. Hopefully once I gain more skill's on Freerider I should be able to attempt more Acro type maneuvers around the house.
Thanks again for your help, and Great Job on FPVFreerider!