Hey Afuza. It's definitely a bit confusing at first. Check out this mod install guide at ZooBerry: https://www.zooberry.org/knowledgebase/zooberry/using-zooberry/how-to-install-mods/. It includes links that teach you how to use and install 7zip, which you'll need to extract the files and where to put them.
AHHHHH!! You have no idea how happy I am to see this. For the life of me I couldn't find my original copy of the game, and the sites online that Reddit recommended kept being flagged by my antivirus. Installation was a breeze. And it booted up with no problems at all. Thank you so much!!