OK, I've decided to fix the oil leaks... What else should I replace?

[oregondave]

Hi guys, I need to do this myself...what the heck is "Wash Rocker Cvr" quantity 10 of which the list includes? I'm trying to keep the costs down as this list looks like it might be a bit on the obsessive side. Can someone explain what that is and whether it's necessary? Also what about the oil separator gasket? If my valve covers are leaking do I need to replace this as well?

Thanks,
D