If you are running QuickTime 4, you will need to be sure that you have installed the FULL, authoring version of QuickTime 4 or Peak will not function correctly. If you are running OS 8.0 or higher, you should install the Sound Control panel (ver. 8.05), which you will find on your hard drive in the Apple Extras folder.
The following extensions are required for Peak:
Appearance Manager 1.03 or better
AppleScript
AppleScriptLib
QuickTime 3.0.2
QuickTime PowerPlug 3.0.2
MSL C.PPC.DLL
MSL RuntimePPC++.DLL
MSL runtimePPC.DLL
Shared Library Manager
Shared Library Manager PPC
Sound 3.3