As in my question, I have the following problem: I cannot "drag" on the Boot Camp Assistant the Windows Partition to be less than 20 GB. I've looked at many guides, including the one in here, but it involves cloning your Boot Camp partition, and using the Boot Camp Assistant all over again to resize the partition - which does not work for me. I will need more space for Mac OS X, since it is my main OS that I'll be using. I need Boot Camp for some intensive work. Any ideas, solutions, or explanations would greatly help. Thanks.