Hello, if you're using windows XP, then unzipping is built in. However, if 
you're using Windows 98, then you'll need that Winzip tool you already have. 
Using the unregistered version should work just fine. When it unzips the 
files, it should unzip them to a subfolder of where it is on the hard drive. 
Say the zip file is downloaded to c:\downloads. Then the zip file should 
extract to c:\downloads\book name. Then you copy that folder to the 
cartridge.
Matthew