Unfortunately for you I am not JonusC :P, but what problem do you encounter when trying to start Zoo Tycoon? An error, absolutely nothing, …? Have you installed the latest version of AsciiWolfs’ [localurl=viewtopic.php?f=25&t=927:24f964hj]Game Explorer[/localurl:24f964hj] which now also includes Parental Controls which is needed to play some games?
If it’s still not working, try to find out what files/registry keys might be missing using Sysinternals Process Monitor by filtering on Process Name | is | zootycoon.exe | then | include (or however the executable is named). For more information about the Process Monitor, search this forum.
Hope this gives you any clues to what the problem might be.