still attempting to dual load Win 8 and Ubuntu

I have made a little progress since my last post. I can load Ubuntu but only from the live disk. I have stopped at that point because I need to know if I now proceed as was normally done with previous Windows O.S. My direct question is this: Do I shorten the partition where Windows 8 resides and then make a new partition in the acquired space, formatting that new partition with ext4, plus making...