If you have the InstaDocs add-on for SAGE that allows you to search for and retrieve documents in the SAGE system, then it is possible to have SimpleIndex directly output to the InstaDocs folder system. If this is done when SimpleIndex outputs the images they will show up as searchable files immediately from InstaDocs.
To do this you first set-up the Output folder in SimpleIndex to save to the same folder that InstaDocs is set to for image storage. Then for each sub-folder in the main InstaDocs image storage folder make and index field in SimpleIndex and make sure that the SimpleIndex fields are in the same order as the folder levels. Then check the Folder check box for each of those index fields in SimpleIndex.