Triangulation,
How did you go about petitioning? Did you fax/email/mail them a course description? Did you include a letter stating your case? I'm about to embark on a similar situation.
My situation
In undergrad, I didn't have to take the Genetics course which fulfills USC's molecular biology prereq. I was a biochem major -- so that class was not required. Instead - we took an upper division course in Biochemistry -- which actually involves more molecular biology principles than a genetics class would.
What's more, I've been working in mol. bio research for the past 3 years! So, I really don't want to sit through an intro molecular biology (or genetics) course during my last summer before being chained to the books.
FYI
Oh - FYI Triangulation, Skyline College is offering Bio 240 (Microbio) - the exact course required by USC - during the summer.
Much luck.
-s