Thanks for the advice; EPG is now working!
I've also applied the seasonal Christmas skin for good measure!!
I have one further question, slightly off the topic...in order to install Media Portal, I created a second partition on my HDD and installed XP.
I repaired my Vista boot record using the tool on the Vista installation DVD and then used EasyBCD to sort out the boot sequence, etc.
This is all fine and I can see the Vista partition when I'm running XP, and the XP partition when I'm running Vista. However, the PC contains an additional HDD for data such as music and movies. Unfortunately, I can no longer see this disc in Windows Explorer (Vista or XP).
I CAN see it in Computer Management, but it has no letter assigned.
Any idea what's happened and how I might solve it?