I want to find a simple Windows gallery-screensaver (configurable
images). Non-spyware, freeware. I would prefer if you know this works
well and without annoying things instead of relying on someone's
product description. So basically if you know of one a simple link
below would answer this.

I have used Anysaver
http://www.dgolds.com/anysaver.htm

This allows *any* program to be triggered as a screensaver. To
actually display the images you could use, eg a PowerPoint
presentation and the Powerpoint Viewer, or I would also suggest
Irfanview www.irfanview.com  This has a screensaver option - you put
the list of image file names in a textfile and call it on the command
line (or from anysaver) using the /slideshow=textfile switch

Owain