I want to know if anybody knows of such a program similar to that in longhorn, which displays a slideshow in a small window sorta like how it is in longhorn.

I would use longhorn if it didn't run so slow on my computer, but i really like that slideshow part, so i'd be very happy if someone could point me to where i might find one similar or exactly like that in longhorn.

I've searched around but i've found that the the slideshow programs i've installed would stretch the picture out, which isn't something i want. I've installed and uninstalled many slideshow programs. I can't seem to find that right one .

well you can try these:

smartbarXP
desktopsidebar
codename: dashboard