I registered for Hon. Life Science II (and applied for OSAP with it) and switched to Hon. Biochemistry II. I
[email protected] ca (Financial Aid and Scholarship Office) telling them about the switch, and they changed my program to Biochem on the OSAP application. I didn't have to start another application.
I'm not 100% sure if they can do this for any program, or only for programs that are similar, but I would contact them about it first. Be sure to include your name and student number in the email.