I have all those copies of XP lying around unused -- one bought with VPC, one from old Vaio, one from old Dell, etc. I paid for all those licences! Do I have to buy yet another copy of XP to work under parallels? It's 650 Francs here in Switzerland (ca. 500 USD). Ouch. I wasn't able to install any of the above XPs, so fell back on Win98, which works horribly at the moment under Parallels, at least in my case.