There is no longer an AppleScript Utility. "its pieces \[are\] scattered elsewhere"
"AppleScript Folder In 10.5, this folder contained four distinct programs: AppleScript Utility, Example Scripts, Folder Actions Setup, and Script Editor. In 10.6, this folder is gone, its pieces scattered elsewhere. The biggie of the group, *Script Editor, can now be found in the Utilities folder, under the new name AppleScript Editor.*"
"In 10.5, *AppleScript Utility* let you change the default script editor, enable GUI scripting, set up Folder Actions, and enable or disable the Script menu in the main menu bar. *In 10.6, you set the default script editor and control the Script menu from the General tab of the new AppleScript Editor’s Preferences panel. Folder Actions Setup is now an entry in the Finder’s contextual menu; Control-click on any folder and select Folder Actions to configure them.*"
"The only scripting piece that seems to have vanished completely is GUI scripting control. *GUI scripting is tied in with Universal Access; you enable it by enabling access for assistive devices in the Universal Access System Preferences panel.*"
From:
http://www.macworld.com/article/142495/2009/08/snowleopardwhatsgonewhere.html
Tony