Hello!
This has remained unanswered for some time, so I'll give it a shot:
LL isn't your father's OS. 95%-99% of the time, you shouldn't have to mess with the config files in LL.
Instead, try 'Menu > Settings > Power Manager'. The 'On AC' and 'On Battery' tabs should let you specify what goes down when the lid closes...
73 DE N4RPS
Rob