I wonder who will help Bush word the pardon to himself.

Well Bill, I suggested in another thread that it is possible for Bush even have an independant enquiry and be assured that he will be freed of all blame. In the UK, we have had experts in this field. Lord Hutton would be worth a try, the most he might suggest is that Bush "subconsciously influenced" something.

My favourite bit of writing on his enquiry at the time is here