Here's how I finally got it to work after much trial and error. In Catalog go to the GDB containing the feature with the associated attachment table and relationship table. Select the feature layer, then right click and choose copy. Paste the copied feature back into that same GDB. This creates a new feature layer re-named [feature name]_1 along with a table named [feature name]_ATTACH_1 and a relationship file named [feature name]_ATTACHREL_1. DO NOT DELETE THE ORIGINAL FEATURE OR ASSOCIATED FILES YET. Next re-name [feature name]_1 to [NewName] then delete the table [feature name]_ATTACH_1 (this also deletes [feature name]_ATTACHREL_1). Now right click [NewName], choose "Manage" then "Create Attachments". New files are added [NewName]_ATTACH and [NewName]_ATTACHREL. Next right click [NewName]_ATTACH then "Load" and "Load Data". A Wizard will pop up with an explanation screen, choose next. On the second screen at the "Input Data" box click "Browse" and choose the original "[feature name]_ATTACH" file then click "Add" then "Next". Click "Next" through the remaining screens until you reach "Finish" You will now have a new feature layer connected to the associated attachments with the new name. Check to make sure the newly renamed feature layer works properly and has your attachments. The original feature layer and associated files may now be deleted leaving you with only the renamed feature layer. Hope this helps.
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