Software to change wallpapers automatically

I want to know is there any free software that will run in my systray and change my desktop wallpaper after a fixed time( say every 15 min or one hour). Currently I am using webshots software for this purpose, it does the job like this but I can,t use my personal collection of wallpapers in it.
Will be thankful for any help.
Thanks.

 

Here's what I use -- Windows XP Creativity Fun Pack PowerToys Wallpaper Changer
http://www.microsoft.com/downloads/...6b-6851-4948-ab76-b5ff22d37d69&displaylang=en

After Installing, just drag your personal collection into the "C:\Windows\Web\Wallpaper" folder.

 

Thanks.
BTW, I just found two more.

http://www.wallpaperchanger.de/index.html
http://jamesgart.com/wallpaperchanger/

 

http://kanasolution.com/index.php?i=61

 

I don't understand.....I use webshots for my personal collection of pictures for the Wallpaper & Screensaver settings....just switch it under options.

 

Ya, u are right. I just found the option. The only problem is that it does not stretch the wallpapers for widescreen notebook.

 

With the MS Wallpaper Changer that's a function of Windows' Display Properties, Desktop tab which you apply to the wallpaper file listed there as "toyhide".

 

Ya, thanks.
BTW, I tried these for a whille

http://www.microsoft.com/downloads/d...displaylang=en
http://www.wallpaperchanger.de/index.html
http://jamesgart.com/wallpaperchanger/
Kana Wallpaper changer

At the moment using WallPaper master.
The one from microsoft uses maximum memory!