do need product key order install windows vista be

I'm currently subscribed as a Microsoft TechNet member. I recently registered with Microsoft to participate in the evaluation of Windows Vista Beta 2. I notice that I can click on the download link for Windows Vista Beta 2, English 32 bit edition @ http://download.windowsvista.com/preview/beta2/en/x86/download.htm. This procedure involves using the Akamai download manager.
However, I'm wondering do I need a product key in order carry out the installation of the Beta software. I don't want to proceed with the download and the creation of the DVD ISO image file and then realise that I need to insert a product key while carrying out the installation. At the moment when I click on the download link, I'm prompted to save or open the _client-LB2CFRE_EN_DVD.iso file.
Anyway, could anybody please advise me if I require a product key for this Beta 2 software. Finally, is it possible to dual boot between Windows Vista Beta 2 and Windows XP professional using NTFS file system or do both partitions need to be FAT32 formatted? Alternatively, would it be recommended to use a separate hard disk for both client operating systems?
Thanks,
Martin