Apparently its entirely possible, This one scientist says he only needs a willing human woman to act as a surrogate mother, but this isn't really a question of feasibility rather than 'morality'. I cant see why not really, Neanderthals were intelligent beings, according to some scientist they could even be more intelligent than we are. I say why not, we could learn a lot.
http://www.telegraph.co.uk/science/9814620/I-can-create-Neanderthal-baby-I-just-need-willing-woman.html
http://www.telegraph.co.uk/science/9814620/I-can-create-Neanderthal-baby-I-just-need-willing-woman.html