never seen a guide mate but shouldnt be to hard just remove your cam cover and change the gasket  if you wanna be sure then go to a mechanic i dont think he'll charge you much
Thats because these are cam cover nuts not head bolts..Done mine today. Super easy job (did it while doing a service) need new cam cover nuts though, 2 of mine have knackered threads now .
So be careful when tightening them up. I didnt actually add much pressure to them at all i think they just had it, as the others have gone up tight.