As the article says, after creating a template form, use:
   in Access 2007: Office Button | Access Options | Object Designers

Note that this approach does have the limitations specified.

Another issue is that embedding a large graphic logo into multiple forms and
reports will bloat the database. You might consider creating a form that
contains just the logo, and placing it on each of your forms as a subform,
so the graphic is embedded only once in the database.

For the basic instructions on inserting a logo in A2007, search Help for
this article:
   HA10096280