Beyond the White Door

1. Remember when you died? (If you don't remember, or haven't died yet, try the next clue.)
2. Do as the shades do.
3. Of course you have to look like a shade first.
4. You need the proper attire (not London vacation clothes).
5. Since you can't borrow the clothes you need from the shades, maybe you can get them from a dead body.
6. Open the crypt and get the burial shroud to wear over your clothes. Then get on the boat and pay the oarsman to cross the river.