If you search for mysql-connector-java*.zip
you should be able to find the driver ZIP file.
Contained within the ZIP file there should be a JAR file named something like mysql-connector-java-3.1.12-bin.jar (depending on your version).
You need to extract the file to certain location and then add the JAR file to your CLASSPATH environment variable.
i.e if you extract to c:\msqldriver
you need to add to CLASSPATH
c:\mysqldriver\mysql-connector-java-3.1.12-bin.jar
Jason