You will require a knowledge of Wiki extensions, described at [url removed, login to view] and probably your own Wiki in which to create and test it.
A new Wiki tag [slideshow pic="dir/[url removed, login to view]" .. ][/slideshow] will be defined. (note that HTML tags are not allowed in this description, hence the use of [ .. ] )
The resulting Wiki extension will be made available to anyone who wants it, also under the GNU license, [url removed, login to view]
Images for the slideshow should be specified in one of two ways (1) As a regular URL (2) In Wiki file format, eg. Image:[url removed, login to view] (where the displayed image is used, rather than the uploaded larger image).
It is NOT required to recreate the "Slideshow Wizard" that creates the slideshow.