hello pugdog
that's somethin i wish or concrete:
users can upload files with adding/modifying links
users can upload files with modifying it's user profile
admin can add files for categories.

the older links-sql versions can make images to a .fil file
something like that is also suitable for links-SQL NG.
but there is one thing, there is no option to upload exe
doc or other file types minto a .fil file

see my complete wish list about images system in the custom modification jobs.
This is also the main wish of most links-SQL users, i think.