Sync desktop background...

Hi I am new here! Just got my theme working and am excited about it. 

I need a background for it now...

Heres what I want:

1. Background automatically syncs to local weather (VISTA)

2. When it syncs to local weather its a great quality picture...I dont want some cartoony smiling sun popping up. I want like HD nature scenes.

I would love to be able to customize what appears myself.

I found a wallpaper changer like this for windows 7 but i have VISTA and it wouldnt work with VISTA. Is there one that exists for VISTA with what I want???

Thank you! 

PS I do not want yowindow...thats a screen saver. i want a desktop background.