Merry Christmas, calia! Hopefully you got ES in your stocking!? :lol
Well, some of us have had that problem and the solution seems to be:
1) unzip the files to C:\Program Files\Microsoft Games\Zoo Tycoon 2
2) inside that folder, you'll see another folder, created by the MAKER (e.g. exitree, penguinman, martin1990)
3) inside THAT folder will be yet another folder (e.g. arctic fox), plus a .dl file also called arctic fox
4) cut the (e.g. artic fox) zoo tycoon 2 file (inside that 2nd folder) and paste it next to the arctic fox .dl file
5) then, take both THOSE files (artic fox .dl and arctic fox.zoo tycoon 2) and CUT and PASTE them into
6) C:\Program Files\Microsoft Games\Zoo Tycoon 2
7) This virtually always fixes the problem
Some computers are configured differently, and some won't 'recognize' the individual folders. Mine, for instance, won't. I always have to do the above to get my downloads to work. Hope that helps! :happy