Yet another alternative...
I went to the local Toyota dealer and asked about the BG Frigi-Clean... well the parts representative said that they stopped using BG products... and gave me an AC kit which comes with an Evaporator cleaner and refresher from "PETRO Checmical A/C Power Foam". This is what they use on Toyotas for A/C service according to the parts rep.
Anyways, total cost is $18.95 for the entire kit. Also, there is no hole to drill. Simply snugly fit the wedge adapter at the end of the dispensing apparatus into the evaporator drain tube and dispense it. 10-15 mins later, foam will liquify and drain out. Then follow with "ConditionAire 2005 Refresher" into the fresh air intake with blower on high...
Whole process took me 20-25 mins... and best of all, SMELLS GONE!
-hkimsoft