Thanks for the advice, I'll try with something else that won't take as much time up. It has a pronunciation guide and the like in it, and it is one of an infinite amount of things I want to learn - but it isn't top of my list.
As for the Sumerian pronunciations, ask Zecharia Sitchin. If you've not read any of his books - which are about mankind's beginning's based on Sumerian texts - I highly recommend them for the open minded ;-)