OK - for people that may be a little confused (maybe me - but I think i've got it), I think in layman terms this is what scuffs discovered.
MCE will only "discover" 2 analog tuners when you run the TV setup.
But, if you insert the correct registry settings, it will handle more than 2.
Therefore you can run the TV setup with 2 tuner cards enabled (the rest should be disabled) at a time to learn what the registry values should be. You then export them to a .reg file, and delete them from the registry. You repeat this process until you have the correct registry values for all of your cards.
Once you have all of the registry values, you enable all of your cards, and run the registry files to insert all the correct registry values.
And MCE will handle all of the tuners correctly.
Is that correct scuffs?
Thanks again,
Mash