Configuring Slideshow as Shortcut in pictures menu

I have a folder called slideshow which has all our favorite pics in. I have it setup so that it runs as the default slide show but would also like a way of adding it as short cut the pictures home page such that you get an icon and can simply select it to start the slideshow.

I'm sure its possible but as a noob I have not found out how to yet. Thanks in advance

Add a button with
http://wiki.xbmc.org/?title=List_of_Built_In_Functions

Wow thanks for the prompt responce Hitcher.

So ideally what I'd like is for that code to be stored against the add-on1 placeholder under the pictures menu. From what I can see that is not going to be done within XBMC but will involve configuring certain files.

I'm not sure where to start. Following the link above takes me to a button config script but it deos not say where this config is placed. If I read it right anyway I do not want a button on the desk top cos I want it under the add-on place holder. Very quickly I'm feeling out of my depth.

I'm running Eden RC2 on windoze if that helps (could not take W7 MCE anymore)