Thanks I posted my question before i had seen you had posted again with the robots.txt and x-robot tips.
I think in December Google said that they were starting to show supplemental results for main search queries, but I would still like to do something about pages from my sites that are supplemental, as I am not sure what is what with with that, so thanks for the advice.
I have never been too bothered by
PR it doesnt seem v.important, but anything that might improve traffic to my site always sounds interesting.
cheers