Its actually really easy.
1: Make a new folder and name it what ever you want.
2: put the jar file in the folder and make sure it is named craftbukkit.jar
3: make a notepad file and put this in it;
java -Xmx1024M -jar craftbukkit.jar -o true
PAUSE
4: save as start.bat this should make it into a cmd batch file
double click on it and the server should load and start up.
Hope this helped