You are done! now all you have to do to sign something is use
the jarsigner program:
jarsigner -keystore myKeyStore jarfile.jar
You'll need to put the path to your "myKeyStore" in if you
are signing an applet in a directory other than that which you did
step 1 in. Obviously, replace "jarfile.jar" with the name of your
Jar file, but you knew that...