I recently replaced the fuel lines in the tunnel and the lines running to the tank and from the fuel pump. There are tons of great tips on performing this truly pain in the arse project! Len Cummings will be your best friend after this!
http://forums.pelicanparts.com/porsche-911-technical-forum/819578-hard-fuel-line-replacement-fuel-pump-engine-bay.html
This is just one of the many threads I used to attack this project. I could have completed the fuel line replacement in 1/3 of the time if I would have had an able assistant.