SP1 includes it? Didn't seem like it. I remember having to actually install drivers to get USB 2.0 to work.
SP2
seems like it works out of the box. It doesn't list anything exactly as "2.0", only as "Standard Enhanced" but my USB 2.0 printer seems to think it's on a 2.0 port so it's obviously working.
I said I didn't want to install any service packs
There's really no reason not to unless you believe all those retards that can't install it correctly.
Either way, you can't just seperate the USB 2.0 from the service pack and get the Microsoft drivers alone AFAIK. Depending on the motherboard chipset though, you should be able to download the drivers direct. I know Via has them for instance.