Yeah, me too. In fact, there are duplicates of the Windows included
screensavers in four different locations. But if I want to add my own to
the selection, I just have to copy it to c:Windows\System32 and it will
be available on the dropdown menu, complete with any available settings.
Is your system 32-bit or 64-bit? If 64-bit, you need to put 64-bit
screensavers in %windir%\System32, and 32-bit screensavers in
%windir%\SysWOW64. The master copies of the scrensavers are the ones you'll
find in the folder %windir%\winsxs\obscenely-long-folder-name.
I was reminded forcefully of the need to separate 32-bit and 64-bit
screensavers; I wrote a functional replacement for the WINEXIT screensaver
and out of habit dropped it into system32 on our (64-bit) Win7 Enterprise
systems - BZZZT!
Joe