Take a look at the GetValue function.
If you use Insert Picture to insert your files, GetValue ( Containerfield ; 3 ) returns the file path in the form that it is stored in the container field. You'll probably need to set up your calculation to modify it a bit as it will start with a tag such as "imagemac:" or "imagewin:".
If you use insert file to insert a file, GetValue ( Containerfield ; 2 ) returns the same data.
This only works if the "store a reference" option was selected when inserting the file.
If you want to see all the text that is available in a given container field, Define a calculation field, select text as the return type, put the container field in the calculation as the only term and then put this field next to your container field.
Thanks, Still new to this but was able to get done what I needed!