I'm running preview installed with bootcamp and VMware fusion. I am a recent Mac convert and didn't want to buy Win7 knowing Win8 was coming. I have special purpose software that only runs on Win - and sometimes doesn't function well under VMware. I understand that I need the system builder version since I'm not upgrading from another Win version. If I create a new bootcamp partition, can I delete the Preview one when I'm ready? Anything else I need to consider?