System Screensavers Tweaker is a freeware portable app which allows you to tweak and change settings of Bubbles, Mystify, Ribbons, Lines and Aurora (excluded in Windows 7 by default) screen savers.
System Screensavers Tweaker
Screensavers shipped with Windows 8, Windows 7 and Windows Vista by default has lots of settings. All of them are inaccessible because configuration dialogs are missing. Screensavers Tweaker allows you to change all hidden settings of Windows Screensavers parameters easily.
The application supports x86 and x64 versions of Windows Vista and Windows 7.
It also supports ported versions of that screen-savers under Windows XP and supports English & Russian languages.
You can download System Screensavers Tweaker from its home page.
Requires .Net Framework 3.5.