I am not sure exactly what slide show you are reffering too, but if you want a regular random desktop background slideshow on linux, please take the simple script I wrote below and put it to good use. Make sure to chmod+x it, and either add it to your xinitrc or some other init file.
#!/bin/bash
PICDIR= #This is where you set your picture directory, ie. /home/lain/Pictures/
TIME= #This is where you set the amount of time that you want there to be before the picture cycles
while true; do
PIC="$(ls $PICDIR | shuf -n 1)"
#Please uncomment one of these, depending on what program you use to set your desktop background.
#feh --bg-scale $PIC
#nitrogen --set-scaled --save $PICDIR/$PIC
sleep $TIME
done
For Windows 7, you can select multiple desktop backgrounds in the "change appearence" then "desktop background" setting, and it will run them in sequence.