Upgrades and Tuning the Koenigsegg CCX: What's Possible?

As we've discussed previously, the CCX is a behemoth of a car, but what happens when you take it to the next level? Upgrades to the engine, transmission, and chassis are possible, but what's feasible and what's not? Are there any owners out there who have made significant modifications to their CCX, and if so, what were the results?