I'm trying to install XP on my Macbook pro with bootcamp. I just replaced my 160gb hard drive by cloning it to a new 640gb hard drive (I zeroed all data and formatted to mac os extended (journaled) beforehand). I wanted to make a 50gb partition for windows and I currently have 515gb free. I don't see how there's any fragmentation that could be stopping it since the cloning process should of defragged... Just to be safe though, I used idefrag and partitioning still fails. I've searched around but havent found an answer and would really appreciate any advice.