that contains the Operating System, you can do either. You just format the hard drive and install the OS.
Drivers for what? XP and Vista contain basic drivers for a lot of hardware, but only very general and basic. A high end video card driver will not be in the OS. But if the OS is "on line" it should get the drivers albeit basic only.
I installed W7 beta on a little Compaq Evo. It collected the drivers for the on board video and audio.
you can downgrade from Vista to XP?
Seems you me it has been said here in the forums that you can't do both. (John maybe?) Kernel differences between Vista and XP was the the problem as I recall. I believe it was, you can't down grade from Vista to XP. Is this correct? (Please provide resource links if possible to confirm this if true.)
Here's why I ask. Recently I stumbled upon a help forum overrun with requests (85%) for XP drivers to be used after Vista too XP downgrades. All the drivers should be in the XP OS and any additional drivers would be provided through XP updates from Microsoft after the XP OS installation, with the exception of perhaps a few. These request run the Gamut from the top to the bottom of "Device Manager, from A to B and everywhere in between from port drivers to CPUs. What's up with this?