I'm hoping for 7 from Lester as well. Pap only threw a few pitches last night, so he's got the ninth even if it isn't a save situation, I think.
As far as the eighth or even seventh if Lester doesn't make it past 5 or 6 for some reason, we have Byrd, Lopez, and Delcarmen who didn't pitch yesterday and Dice-K who indicated he was okay to pitch out of the pen for Game 6 and so should be able to for Game 7 as well. If Lester doesn't go more than 5 or 5.1, 5.2 innings, I would rather see Dice-K for two than a tired Oki or a shaky Byrd, or, gods forbid, Mike Timlin.