RCT3 Costum Supports

I got a little question about RCT3 costum supports: If you upload a file with costum supports (like steelworx) in it, and someone else without that pack installed downloads it, does the file crashes then or are the costum supports just not showed?

I didn't know they had costum supports

well they do. you can download them at the atari forums

If you do decide to upload a track featuring the custom scenery, just tell people they need it and provide a link so that they can go download the pack and use it. That way you have no problems and people can enjoy tracks the way you want them to.