You do have the feel for this. :-)
BTW, since the producers survived season 4's move to a more reality-based plot (where the terrorists were (gasp!)Muslims) I think this year the bad guys are Chechens.
No, you are looking at it wrong. Jack didn't need to be alive for their plan to work. They already have the doctored footage to plant in the surveillance camera. They kill Tony, Michelle, and Chloe, then kill Palmer and plant the footage. All of a sudden, CTU is searching for a guy they think is dead. Even if Jack really were dead, CTU would be searching high and low for him. It's just a plus that Bauer is alive.