I been thinking about the ops question for a long time...
I think you either have to make one from scratch
or
You can do something like take 3 decent (interesting) campaigns, connect them to where there are many subplots, to allow player freedom. Then you have to optimize the encounters.
You have to decide clearly, Where the mooks show up, When the Mooks plus elites show up, when/where, the Squad of elites get fought (mirror match basically), and how the Leader(boss) will be fought.
I find the best way to deal with CoP is to have a multitude of thing going on in your world.
I also think it has to embrace the D&D-ism's mechanically. This is why I loved Frank and K's Tome Series so much they build a World around the existing mechanics in many ways, ends up being an "awesome setting".
Still my example is like what Unbeliever mentioned. Assassinating the king in D&D is like killing a vampire or a tarrasque, you have to kill him, destroy the body, trap the soul, and cast a wish wishing that anyone who wishes for the body summons a entropic reaper instead (or some such nonsense) you get the idea. Also you'd have to wish that anyone divining as to "Who killed the king" gets a garbled message of "Thier own name, killed the king".
Shit like that.
Here's the deal though. . . only SOME people in a game world are aware of the high workings of high magics and psionics. Not everybody, so while at low levels somethings works, at higher levels some of the same things WON'T work because the only way you are allowed to stay in the ranks of the mighty is if you're actually aware of "How the game is played" so to speak.
So some dudes have Secret Meeting vaults that defeat (via the rules, NOT fiat!), some dude have had thier name scrubbed out or some such by truenamers, and some of them just mind blank and mindblank the messengers, and elites, an mini-bosses.
Thats only SOME dudes... and if you over do it yeah it becomes "You banned divination" so its a thin line just remember "SOME", not most, not all, just 1 Knightly order, 1 Ninja (ahem Swordsage) clan, or 1 Villian....who has a secret lair named "No where", and has a name like "You're Mom"

Still you gotta let the player use thier powers as best they can.