Screen Saver or Slideshow Help W/ Dual Screen Rig

Hi. I want to have slide show show on 2 screens, also be nice to have screen-saver show up on 2 screens, pics on each or alternating
I have a 64 bit Win 7 Porfessional,, 8 core AMD processor, two Asus cards in an SLI rig, 8 gigs of ram. This is a home-built rig I use for flight simulator, and streaming YouTube
My Win XP machine I use as a map computer, does not have a problem using both screens for screen - saver pics slide show. And this is an ancient machine.
Any help or point me in the right direction would be much appreciated. Thanks.

2 LCD screens, one an ancient Apple 15" the other is a 42" Vizeo

Hi, Guy... I will try this...but it seems to me that there would actually be a setting. I am mainly interested in, transfering the slideshow to the big screen. This is not a screeensaver, is what I think. I try to drag explorer over to it, but it opens up in the smaller screen. I was thinking that if I could get it to work, screensaver would follow. I have an ancient G4, 1.25 ghz dp Mac, that I believe will row the slideshow on both screens, and definitely will do what I like in terms of screensaver, throwing up two pics consistently to both screens. I mean, this is an 8-core processor, with two vid cards.... I really expected more in the way of settngs when I added the sli. I will try it a little later on. Thanks for response. setupcity.