Okay, so.. now what? Installed Bukkit.

I followed the instructions in http://forums.bukkit.org/threads/how-to-install-bukkit-newb-friendly.245/ <--- that topic.

Now, I have Bukkit installed. But how do I make it work on the server I have that exists already? How do I actually start.. Bukkit-ing? How do I know that it's in the right area or installed correctly? Where do I find out if I can even use Bukkit on my existing world without making a new one?

This forum seems awfully vague for those of us who have a 0% understanding of Java and just want to run a server administration\plugin tool.

I found a Bukkit tutorial topic here on the forum started by the owner but it dealt with editing .jsv files and actually knowing Java code and well, yeah -- I'm a player, not a coder. Thanks!