Yes, XP Home supports Dual Core..

There’s been quite a bit of misinformation on the internet about the Core Duo, and now, the Duo 2 CPUs regarding Windows XP Home.

Observe. Windows XP Home SP2, 2002 release.

Just an XP Home Property Window

Note the two CPU graphs.

XP Home supports Core Duo

This is standard Windows XP Home SP2, I have done nothing to enable this.

Stock Core Duo in XP Home

Note the processor affinity, with the two seperate defined CPUs.

I hope this has cleared up this bit of misinformation – you don’t need XP Pro, unless, well, you need XP Pro.