first- remember you need a neck the same scale and fret no. as your original one, and the same nut setup usually
it depends what you get, if you get an
ibanez neck off e-bay or a fully completed
custom ibanez neck, it'll usually be a direct hardware and neck swap and you may simply need to adjust truss rod, nut height, neck pocket angle(if necessary) to get it setup well.. which are really quite easy setup issues once you know what to do and you can get the nut sorted by a tech if it's not a floyd nut..
i think blue alien was probably talking about a custom neck by a luthier or company who didn't predrill those holes.. i doubt it would have been an original ibanez neck