IUnstalling a second domain to php/mysql (no replies)

Hi
I have a domain upon which I run wordpress with mySQL/php which works fine.(barrie@kissack.org.uk).

I have a second domain parked with the same ISP (braunton.org.uk) and forwarded to webspace on kissack.org.uk

I have 3 mysql databases unused on barrie@kissack.org.uk.
How can I make use of them with braunton.org.uk?
Do I need to install PHP for braunton.org.uk?

Ionly want to use the 3 remaining databases to store information.

Thanks
Barrie Kissack

barrie@kissack.org.uk