If you don't have RealJukebox, go to real.com and scroll down to the
free download button (Don't pay!) and that will take you to another page
where they try to make you pay again. Ignore the versions you have to pay
for and find the "free download" link again.
Once RealJukebox.exe is downloaded, you unzip it and install it. That
will make a RealJukebox folder with the "skins" folder in it.
Once you've put the oraskin.zip file in the skins folder and launched
RealJukebox, in the "view" pulldown menu, you'll find "skins" and in there
you'll find "oraskin". That should change the look of the RealJukebox
window to the O'Reilly skin design.