I have a one row portal which contains a container field. For the life of me,I can't figure out how to script placing a photo inside that container field. It's simple enough when the field isn't in a portal, but how do you do it when it is? Thanks in advance.

You need to start with a Go To Field [ your related table:: container field ]

Also, depending upon the one row portal, you may need to begin with Go To Portal Row[].

I assume you got your question answered about the visibility technique? You can put anything within the portal, including several fields.