My apologies in advance if these questions are very basic. I've tried searching the forum but haven't found the answers I'm looking for. I've finally had it with microsoft and I'm taking the plunge into the Mac world, but I will continue to need to run some Windows applications. I'm going to buy a MacBookPro 13" 2.53 GHz and I want to run Windows on it through either Parallels or VmWare (I'd also like the ability to run Windows through Bootcamp but most of the time I'll be using Windows and OSX at the same time). I've got 4 questions about all of this that I have not been able to figure out so far. 1. I want to run Windows XP, not Vista or 7, because I have a legacy program I need that works perfectly under XP and not necessarily under the newer OSes (hence my current migration to the Mac). But I've never bought a stand alone copy of Windows before - it has always come installed on any PC I bought. Searching online seems to lead to a dizzying variety of WinXP (not just Pro vs Home) but Special Builder Edition vs OEM vs etc. etc. I want a legal copy that I'll be able to freely update without any hassles. What should I get? (And where's the best/cheapest place for it if you have any suggestions?). 2. Once I own a copy of Windows XP, what's the best way to install it on my new MBP? Should I install it under BootCamp first? And then install Parallels and/or VMWare on the Mac? If so, do I have to install Windows again under Parallels/VMWare, or will they recognize that it is already on the machine under Bootcamp? 3. When I first install Windows I believe that I'll have to make (irrevocable?) decisions about how much disk space and Ram to give to the Windows installation. Is this correct? I would be grateful if anyone has any suggestions about what good numbers would be for these decisions. The MBP will have 4 GB RAM and 250 GB HDD. I expect that I'll probably be running both OSes almost all the time. I'm also planning to run Windows software (that I already own), such as the legacy program I mentioned above (Ecco), MS Office, Endnote, Quicken, The Bat!, and probably some others as well. So I definitely want to be able to have multiple Windows applications and/or documents open at the same time without a big performance hit. On the other hand I don't want to needlessly give too much of the MBP's ram or hdd to the Windows install and be left with weak performance on the OSX side of things. I expect that my music/videos/photos will all be getting accessed primarily through OSX, so I'm not sure how much hard drive space Windows will need, but I'm assuming that the Ram demands may be more significant. Any suggestions regarding what settings I should make when I first install Windows? (And am I correct that it will be impossible or at least very technical to change these later?). 4. Regarding the question of Parallels vs VMWare, I've read so much conflicting advice about which is better that I was thinking of installing trial versions of both and trying them out for myself. Is it possible to have them both running on the same Mac without screwing things up? Is it possible to have them open at the same time? (That seems like it would be asking for trouble and there's no real need for me to do that). (And of course if anyone can suggest any compelling reason to go with one over the other I'd be happy to hear it). Many thanks for any guidance you can give me about any of these questions. I've been reading a ton online but I've been unable to get these 4 basic questions sorted out. regards, Abe Z.