Looks like you're still on the original bearings, anyhow the noise can be caused by them gone dry, i'd expect you'll find out some very fine goldish dust when turning the rollers.
You always have to replace the conical washer.
Although i've fitted a bunch of bearings by directly fitting them with the conical washer, and never had a problem, i'd reccomend you to get hold of a big flat washer (the one mentioned in the hynes).
Your best way to deal with new bearings is to tighten up the hub with a flat whaser to allow correct seating of the hub and bearings on the outer CV. Hold the drive flange and spin it round a bit so the bearings can turn during the process of tightening. Let it torqued by the flat washer while you're having your tea, then undo the nut, remove the flat washer, fit the conical washer and torque up again.