I'm really sorry but I am too stupid to install buildcraft for my bukkit server. I cant even install ModloaderMP. Could anybody post the complete bukkit server with buildcraft? Please guys help me please it takes just 5 minutes for you EDIT by Moderator: merged posts, please use the edit button instead of double posting.
Google for mcportcentral, they maintain a forked version of CraftBukkit for this and have their own forums who will be better equipped to provide assistance.