It will be a tough call for W. The Old Boys Network that requires that ex-Presidents don't criticize sitting Presidents and sitting Presidents don't indict ex-Presidents is still pretty much in operation (as long as you don't count that yo-yo Jimmy Carter.)
So what does Karl Rove tell George to do? You want to kill a Hillary Presidency? Then let the lid off of the OKC bombing story and that will be that. We can run against Kerry or some other Losercrat in 2008.
That may be a tough call for W but it's not for me.
The Bush administration will never allow the truth about OKC to be uncovered, because it would impact the GOP as much as the Democrats.
I don't think it is a tough call for W. I think he lets good peolpe do the work that is needed - with none of his fingerprints on it.