I want to install windows xp on macbook pro and air. The macbook pro is running OX Snow Leopard and the macbook air is running OX Lion. I am planning on installing windows via Paralles. I have one concern, if you run windows via bootcamp, the 2 hard drive partitions stay seperate and virus on windows won't affect the mac files. Will this also be the case when running paralles? Will it create a separate partition to store all the windows files?