ScenEdit_UseAttachmentOnSide (attachment, sidename)
This function uses an attachment on a side (used for .inst files as attachments).
Parameters
- 
                         attachment
                          string 
                        Name
                        of
                        the
                        attachment
                        (as shown
                        in the
                        properties
                        section
                        when
                        created/added)
 or more accurately the GUID of the attachment (as found in AttachmentRepo folders)
- sidename string The name of the side to import the attachment into
Returns
                      True/False 
                    True if successful, or  nil otherwise
                
Example
 local b = ScenEdit_UseAttachmentOnSide('8269b881-20ce-4f2e-baa0-6823e46d55a4', 'sidea' )