CH -> CE upgrade is relatively unknown. To start with, what year model is the CH, and also is it ES, LS or VRX? Depending on model it could be 4x100 or 4x114.3. Although the biggest issue isn't going to be your PCD, whether or not your trailing arm will bolt up will be the major issue. You need to do some measuring to see if it's going to match.
Although, why not keep your eye out for a proton with rear brakes? That is the known conversion to 100% bolt up. If you're set on the CH, you're gonna have to do the research work and try it.