Hello again,
I've answered my above questions...
I got the embedded AI Canvas App working by:
1) Creating a new 'URL' Column within this Table and set the max length to 400 characters, as shown below:

2) I added this new URL Column to my Main Form
3) I went down to the Component section of the Form and switched the Component type from 'URL' to 'Canvas App' and then bingo, the image of the AI App appeared on the Form.

4) I added inserted the URL in to the embedded Canvas App both of the above 'Entity Name' and 'App Name', but it presented an error message stating the string exceeded the 100 character limit for these fields.
Question: Where can it statically preset this URL string, rather then entering it live?

Cheers,
Cosmo