In terminal:
osascript -e "tell application \"Preview\" to open \"/System/Library/CoreServices/Installer.app/Contents/Resources/Installer.icns\""
Installer.icns\""
Hmm, seems a tad roundabout. Why not
open -a Preview.app /System/Library/CoreServices/Installer.app/Contents/Resources/Installer.icns
...or at least
osascript -e "tell application \"Preview\" to open \"/System/Library/CoreServices/Installer.app/Contents/Resources/Installer.icns\""; osascript -e "tell application \"Preview\" to activate"
so the Preview window is in front?