Cancel Win XP Pro installation

[ADB]

I am trying to cancel an installation of Windows XP Pro. I discovered that I
am using the wrong disc (installed on another machine) and want to install
Windows Home. However the machine is putting me thru hell by not allowing me
to cancel the installation, it simply keeps cycling to the point where it
asks for the product key over and over. Removing the disc generates an error
that causes a reboot that asks for the disc and then goes thru install again
and is in an infinite friggin loop.
I am completely fed up. How can I stop this?

 

[Mick Murphy]

Set the Boot Order to boot from CD/DVD drive 1st(you should have that already
done if installing XP Pro), insert Home disk, reboot, load files, delete
whatever partition you have already set up, set up your new partition, format
it, install the Home OS.