Well, here's how I do it. I click on the green track button, but for mine (idk for other people's) it says "Could not Locate NoLimits Root Folder!" Sop then i got into program files, yadda yadda yadda, until I get the NL Simulator button. Then okay, yes, whatever button. Once you have it open, click file, open package, and if you've downloaded it, go into your downloads folder, and the nlpack should be there. Then select it, click open, and it should show a list of the ride's 3ds/ environment/ cartextures, and thats it.