There was another post about this recently that I and others responded to. You may want to search for it.
Comm insp training is good to get a handle on the larger mechanical systems, egress req.,etc.
The important thing is to change your mindset on how you view the inspection. Comm clients usually have specific goals, criteria in mind that they want to get info on. They don't usually care about the same things a home buyer does.
I usually have a meeting, phone or in person with the client prior to insp to find out what their goals are. I also do a drive-by/walk-around prior to official insp to get a feel for the place and give pricing.

__________________
Accurate Inspections & Consulting, Inc.
773/844-4AIC
Markus Keller