You would be better adding MCPC+ rather than BukkitForge
Go to
http://ci.md-5.net/job/MCPC-Plus-Legacy/646/ and download the top file (
mcpc-plus-1.5.2-R1.1-forge738-B646)
In your servers minecraft folder you will have a FTBServer.jar or something named similiar, rename the mcpc-plus jar so it has the same file name, replace it and start the server, it will create a plugins folder, then just pop your desired bukkit plugins into that folder and restart the server.
Make sure to use plugins that are made for 1.5.2 (most 1.6 plugins do work, but not all)