I noticed that nobody answered. It would be in the eye of the beholder what
an "attachment field" exactly would be. Obviously it would record linkage to
a file, but that doesn't take a field type. For most people this to a .jpg
would mean the ability to view and print the picture.
For Access 2003 and older, the OLE field isn't viable for this and so the
choice is simple. Store the path and file name of the picture in a text
field. Use code to display the image in forms and reports. Previous posts in
this forum covered how to do that.
For 2007 (which I own but don't use) I heard that the OLE field is viable
which give you a second choice.
Hope this helps a little.