Shpeck runs Winamp visualisation plugins in a stand-alone window, a Columns UI panel or Default UI element. Winamp itself does not need to be installed. Only one plugin can be active at once, though - that is a limitation of the original design.
Shpeck shouldn't be used with other Winamp emulators because of possible conflicts. The recommended solution is to keep Shpeck only - because it supports the biggest number of Winamp's features among these emulators, it shouldn't be a problem.
Winamp is a registered trademark of Nullsoft. Various third-party plugins are owned by their developers and their usage is restricted by their respective licenses.
0.3.7, released on 2009-09-28