Well I tried to, but when I finally got the manifold off, and I saw that I needed to remove more stuff to disconnect what was on top of the rear valve cover, I gave up. You need a lot of time, and it is alot of work.
When I eventually took it into the shop to have them replace the seal, it was in there for a good 4-5 hours.
It was one of the few things I gave up on trying to repair on my car.