I've seen some photos on the Internet of c-22 developed that way. Results were poor, but this could be due to lack of a good solvent such as benzyl alcohol to help carry the agents into the emulsion. Note that this process was discontinued around the time the EPA was formed. Benzyl alcohol isn't a very environmentally friendly solvent to go down the drain. Good luck.
So you suggest putting that as an additive? How much would you add? Would it ruin the C-41 chemistry for following that with regular C-41 films?