Off Topic: You have a Vista? Cool!
Anyway, I doubt Wildlife Park will work on Vista an such an early age. Wait for Crazy Zoo, then perhaps see if it's compatible. I recommend joining the WP2 forum and posting it their.
EDIT: Well, I'm suprised JPOG worked (that's an awesome game!), but do remember, the two games have completely different engines (WP2 has gamebryo, JPOG has TOSHI) and perhaps Gamebryo requires updates to work on Vista. Again, go to the Deep Silver forum and put it there, they can help you more than we can. I do have WP2, but I have a super-Media version of Windows XP (which, possibly, got fried in a lightning strike), and it works super-deluxe on that.
Oh yeah,
:easter2