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As a newlywed (1 year Sunday) with a baby on the way, I'd love a portable utility along the lines of WallSwap (http://www.paranoia.clara.net/software/wallswap.html), a wallpaper swapper that randomly chooses a picture from a pre-set directory, can randomly change wallpaper throughout the day, and will resize or tile the images as desired.
Read this thread before "they" jump on you!
You have been warned!
https://portableapps.com/node/7638
Try searching before asking, upper right hand corner.
But it's not always that easy.
Yes, you made a request, not an "if" or "when" but "they" won't be that forgiving.
Say two "Paters", one "Ave" and one "Gloria".
You will have done enough penitence.
Mr. Bunny forgives you 
(\__/)
(='.'=)
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I did my homework on *ortableApps, U3, and Google, and found the results of my search lacking.
Many conversations refer to the U3-compatible swapper but I never got that program to work with my U3-installed Titanium USB key.
I hoped by being very specific about the features I was looking for and referring to a specific program that offers said features as an example that I could be helped in my quest by people with more resources than I'm aware of, and more knowledgeable about portable programs.
I downloaded this so called "Wallswap" and started using it. It turns out that all the settings are written to an ini file. It creates 4 (or 3 or 5) reg keys but are not used by the program, so they are safe to delete. The only issue is to get the original wallpaper back once you're finished using a computer. Other than that it should be portable already.
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