Using bootcamp on my macbook I know I am sort of "locked in" to the amount of hard drive space I allocate for windows programs. T would tend to overestimate the area needed because "you never know" if you will need more space for windoz. Before doing a bootcamp with "Mini-mac" (thats the name of my computer!) , I have also been considering Fusion or Parallells. Do either of these programs allow you do dynamically change the area (larger or smaller) used for windoz programs? Bonus Question: Using an external drive for windoz? I probably use windoz programs about 50 percent of the time. Another possible consideration would be to run them all off of an external drive. Is this possible? Would it drastically reduce the speed?