Go get this tool: http://forums.bukkit.org/threads/admin-chunkster.8186/
It worked for me. Took a little while to understand how to launch it with java but eventually i got it to work.
I copied the Bukkit server run.bat somewhat but here's what I used to get it to launch (make it a notepad document and save it as a .bat file)
IF /I "%PROCESSOR_ARCHITECTURE:~-2%"=="64" "%ProgramFiles(x86)%\Java\jre6\bin\java.exe" -jar Chunkster.jar world