Elaine,
I hope some of this code puts you on the right path.
After importing the file in your code, include some or all of this code to
set up the bookmark.
Bookmark names can't have any punctuation (nor spaces) except the underscore
character!!!
Dim myExhibitName As String
myExhibitName = "My Exhibit of July 7 2007"
'Can't use a comma in potential bookmark name above.
'Make bookmark name legitimate by trimming end spaces and replacing
'other spaces with underscore characters and length < 46 characters.
myExhibitName = Left(Trim _
(Replace(myExhibitName, " ", "_")), 45)
'Paraphrased from VBA Help: Predefined bookmarks, \Section is current
'section, including the break at the end of the section, if any.
'This line assigns the current section a useful bookmark name by the .Copy
'method.
ActiveDocument.Bookmarks("\Section").Copy myExhibitName
P.S.
If I were doing this, I would probably create a userform dialog for adding
and deleting names. A dropdown list of bookmarks could be loaded with all
the current bookmark names for deletion and of course refreshed after a
deletion.
A textbox for input and an 'execute' button would name the collections and
add them to a section along with a legitimate bookmark name and of course
refresh the dropdown list of bookmarks.