Yes, the actuators are installed inside the metal door panels.
I did my actuator replacement after watching one or two Youtube videos for removing the Aveo plastic door panels. Just Google Youtube Aveo door panels, or Youtube Aveo door locks. You should find something.
If I recall correctly, the Factory Service Manuals were not very helpful when removing the plastic door panels or replacing the actuators. So if you don't have access to a Factory Service Manual, no loss.
One thing to remember is that the window needs to be rolled down to remove the plastic door panel, but rolled up to actually get at the actuator. And then rolled down again to re-install the plastic door panel.
Give yourself about 3-4 hours to replace one actuator.
Hope this helps.
Deano