try a lava bucket :)

if you have mcedit downloaded download schematic put it into your schematic folder then open mcedit load a world and chis the "import" option on the hotbar place the castle in a place that u like making sure that u check mark the copy air and copy water boxes crtl+s after you press import then close mcedit and start up minecraft load the world and enjoy your new castle :)

i will right now i actually have lots of them couse its fully functinal

thx:)