Mac newbie here. I'm planning to install VirtualBox to run Windows 7. Once I install a VirtualBox VM, I guess I can size the amount of disk space I want to give it and max RAM. However, if I want to delete the Windows installation, it should be pretty seamless as I am not creating a new partition, right? Rather, by going the VirtualBox route and not Parallels/BootCamp route, I can keep Lion has the main OS. Thanks!