Brian,
I probably did this the hard way, but I added an OLE field to the table
definition, created my own thumbnails folder using an image editor, and then
"linked" the thumbnails to the OLE fields. All this may sound easy, but I
ran into numerous technical problems before I got it all working, most of
which were related to the problems of using any OLE object with an Access
database. In my opinion, the Access designers did a poor job implementing
this capability.
I made sure that the thumbnail images had the same file name as the primary
key of the database records. This made it less confusing when I linked
them. By the way, I keep the full-sized images in a separate folder using
the same file names. So I have three entities - the database itself, the
thumbnails folder(s) and the images folder(s).
Hope this helps.
George