I don't use ChromeBooks so sorry if I've got anything wrong

can see you've downloaded the file 5+ times haha.
1. Grab one of the P184(...etc).ZIP files you've downloaded
2. Copy
3. Open your SD card/USB stick location
4. Paste
5. Right click on the folder
6. Press 'Extract here' (thats what you need 7Zip or WinRAR for)
7. Once it's done extracting the files delete the .ZIP folder
Hope that helps somehow