Install CraftBukkit here: http://dl.bukkit.org/downloads/craftbukkit/
(I prefer the latest version)
Put CraftBukkit.jar in your Minecraft Server folder and rename it as CraftBukkit.
Now open up Notepad and copy and paste this:
@ECHO OFF
SET BINDIR=%~dp0
CD /D "%BINDIR%"
"%ProgramFiles%\Java\jre7\bin\java.exe" -Xmx1024M -Xms1024M -jar craftbukkit.jar
PAUSE
If that doesn't work, visit this website: http://wiki.bukkit.org/Setting_up_a_server
After that, go on Save As, and name the file "Run.bat" without the quotation. And on the file type, put it as "All files" instead of "txt".
Now click save and look for your Run.bat file. It should come up us Run. Place Run in your Minecraft Server folder. Double click Run and a command prompt should appear. Wait until it says done, and you've got yourself a bukkit server! If you want to use plugins, download a plugin from here: http://plugins.bukkit.org/#ti=&ta=all&au=&subm=false&pno=0
You want worldedit, right? So install worldedit from there and place it inside the Plugins folder in the Minecraft Server folder. Reload your server by typing in reload on the black command prompt. It should reload and you've got WorldEdit.