desktop background programs

[kcm016]

I have a screensaver/background program from SOFTSTUF that cycles images for the background every hour/day/week/etc. I tried to put personal bitmaps and pics in the image folder of the program thinking it would add my pics into the rotation. I made sure the to match the file types and any other labels the program images had, but my idea did not work. Is there any program that enables me to use personal images and cycle them like this program does? Thanks in advance for any help.