Does anyone know if you can change an Integrated headset to a Standard Headset?

This is the situation. I have a P2K (model year 2002) with the integrated headset. After racing in Ironman USA's "wonderful down pore", I believe water go into the headset. Don't asked me how, but all I can say is that the steering doesn't feel the same. It feels "sluggish" even though I did my best to dry off the bike.

Does anyone foresee any problems switching from the Integrated headset to something like a CaneCreek C2?

Much thanks,

-Joe