it’s just that easy….
on run {input, parameters}
tell application “Finder”
open application file “MaxMSP Runtime 4.5.app” of folder “MaxMSP 4.5” of folder “Applications” of startup disk
end tell
return input
end runon run {input, parameters}
tell application “MaxMSP Runtime 4.5”
quit
end tell
return input
end run