Zoo Tycoon 2 crashes

I'm sorry if this is an old question but I just cannot find the answer anywhere. I am aware that there is a patch for Zoo Tycoon 2 available through Macsoft but I just cannot get it to work.

I installed Zoo Tycoon 2 and i really enjoy it, but it crashes every couple of minutes and it is really frustrating! I downloaded both of the patches from the macsoft site and it says to "navigate" your way to you "zoo tycoon 2 files" - i've tried everything i can and it just says that the files i've selected cannot be used with the patch.

I've tried using the main Zoo Tycoon 2 folder on my Hardrive. the other folder is in my documents (for some reason) which is where it saves the main game folders but none of those work either - am i just being really dumb?

I'm desperate for some help. I've tried contacting Macsoft and they haven't responded. Please, please, please help!