Powerdvd DX reinstall CD's - none came with machine

Hey folks, I have a Dell Studio XPS 1640 which came with a blu-ray drive and PowerDVD DX installed for HD playback.  I've wiped the machine and rebuilt it but just discovered I don't seem to have a reinstall CD for the software, the four that came with the machine are Vista HP64 (preinstalled), driver/diagnostics, MS Works and Vista HP32 (?!).  I've looked through the Dell FAQs and they step through reinstalling from CD which suggests I should have a CD.  I've looked at the sticky topics for ordering CDs although they are for the US (I'm in the UK) and seem to be for OS/driver CD's which I don't need.

Any advice appreciated,

John