Right click on ur WoW icon on desktop - click properties at bottom of list - then when the box opens - click "find target" - it will then open up ur Wow folder with cache,interface etc in it. - Click data which is the 4th folder along the top - then click enUS - then on the bottom right u will see realmlist.wtf
now open notepad on ur desktop, and left click an drag the reamlist.wtf onto the open notepad and it will show u the realmlist info, change wateva u gotta. then click save and ur done.