OS X Lion

How to Reset Password in Lion 
See http://www.macyourself.com/2011/08/20/how-to-reset-password-for-mac-os-x-10-7-lion/

Disable Mac OS X Lion Resume
Disable Mac OS X Lion Resume & App Window Restore Completely 
 http://osxdaily.com/2011/07/18/disable-mac-os-x-lion-resume-window-restore/ 
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 Disable “Reopen Windows When Logging Back In” in Mac OS X Lion Completely 
 http://osxdaily.com/2011/08/25/disable-reopen-windows-when-logging-back-in-in-mac-os-x-lion-completely/

Disable Mac OS X Lion 10.7 Startup Chime / Sound 
Write a couple of Mute/Unmute shell scripts as outlined below, add them to the login and logout hooks. 
 Mute Startup Sound in OS X Lion 
 The files and the parent directories must have the following permissions: 
 -rwxr-xr-xowner: rootgroup: wheel