my problem is that i cant find out on how to save le roi i can get out side with him and i cant do any thing ealse and now i cant figuer out anything ealse i really really need help

Man this threads been going for a month, your probably done by now but heres some advice anyway.
Go through the entire level without him and kill all the zombies, so when you are with him you have less to worry about.
Use the ward age and stay by him, use the biggest shotty/ machine gun you have, there is no secret to helping him, just stay right neext to him while you protect him so the monsters will attack you and not him as much.