How do you play WoW private servers

what you do to play private servers.
I personally use WoW FE.
Simply open WoW FE, click File, then click Play on Official US/EU server.

If you don't use WoW FE, here is the Download
http://wowstatus.net/wowfe.php

After downloading WoW FE, click on Options, then click Preferences. It should say Path to WoW, then a blank bar and a "Browse..." button, the bar should be C:\Program Files\World of Warcraft
(With an external hardrive I believe it's F:\ )

Then at the top of the page go to status list, scroll down a bit and click Standard Server List.
Search for a private server you would like to play, when you find one, click on the name (e.g. http://wowstatus.net/detail.php?server=3...
Click the Account sign up page to make your account on the private server (I suggest NOT using your retail information.)
Then with WoW FE open, click the Click Here (to add this server to your favorites.)
For your Favorites List to not be deleted on the closing of WoW FE, click Favorites, then click save.

Also, in Preferences, have the box for Auto-Load Favorite checked, and the other box blank.