Mine's an '05 as well, I ran the vacuum line against the firewall all the way to the driver's side strut tower. I then lifted up the seal strip for the hood where it meets the fender and there's a small gap there that a vacuum line will fit through. I took off the plastic cover for the windsheild wiper and ran it through there and down to the door and into the cabin. Lazy man's way I know, but It's working just fine for me and I've got it zipped tied out of everything's way to keep it from binding somehting up.
