PCOM says that to fill out a supplemental app, you need:
Letter of evaluation from the premedical committee, premedical advisor, or the Dean of the college granting the undergraduate degree. Individual faculty letters do not fulfill this requirement.
I guess I won't apply there as my school had no premedical committee, the advisor sucks (doesn't even know what a DO is) and there's no way I'm gonna be able to get a letter from my dean...