i plan on using vmware fusion 2.0 or parallels 4.0.. i heard fusion is more stable but the video on parallels website is more enticing.. dont know which to get.. but my question is: i heard vmware and parallels will ask me to configure the laptop to allocate 1 to 2gb memory for windows .. does that mean itll limit my MAC OSX from using all 4gb at all times to only 2gb of memory? or only when i am running the vmware/parallels program? and i also heard u have to allocate a portion of ur hard drive to the parallels and vmware. if i have 300gb of hard drive space and allocate 20gb, does that mean i will only have 280gb of space available on my MAC OSX at all times now? thanks!!