It's not up to us to tell you what we have, Me2. I've found it's always a good idea to keep my hacks/mods in subfolder so I can pull them all out if I need to and not have to fiddle through my entire downloads folder.
Now, having said that, are you sure you downloaded the invisible recolour of the magisplay table? To use it you have to select the visible tray, place it, then use the swatch tool in buy mode to change the colour. If it's still not working, then try using
The Hack Conflict Detection Utility to if you have any conflicts. (It's under Sims2>Programs).