Here is a link on the FAA website to the PTS.
http://www.faa.gov/education_researc...S-8081-14A.pdf
The PTS is the same one for you had for your private ride. The AMEL is in the back. Look at table 2-V, in the first column under the heading ASEL. That's the certificate you have now. It lists the tasks you will need to accomplish for the private (not commercial) AMEL rating. They include:
Preflight - performance and limitations, systems, and principals of flight - engine inop
All aircraft preflight activities
T/O and Landings, normal and short field (no soft field)
Steep Turns
Slow flight and Stalls
Emergency operations - V1 cuts, engine out maneuvering, visual single engine approach, etc.
Multi engine operations including a VMC demo, engine failure under IFR, and single engine approach under IFR