Nice to meet you, Kuro-Neko! I saw it was your first post, so make sure and go over to Introductions and introduce yourself!
Now, as to your question:
Some of us
have had that problem. If some of your animals worked and some didn't, that' IS odd. But you might try this:
1) You've already unzipped the files to C:\Program Files\Microsoft Games\Zoo Tycoon 2, obviously
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 zoo tycoon 2 file (inside that 2nd user created folder) and paste it next to the arctic fox .dl file
6) Now you have two files side by side, both named arctic fox
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 almost always fixes the problem
Some computers are configured differently, and some won't 'recognize' those individual user-created folders. Mine, for instance, won't. I always have to do the above to get my downloads to work. Hope that helps! :happy