Treeman (and the group)
Here's a site you might like to bookmark, it has exploded views of just about every part in the VW, and in most of the variations, like stale air/fresh air heaters and such.
Re the grinding noise, take a close look at the six small bolts which hold the CV joints to both the gearbox and the stub axle assembly - these can loosen. They use a 12 point spline driver - DON'T try to use an allen key or a Torx drive or you'll strip the heads and never be able to get them off. Torque to 25ftlbs (that's quite a lot on those small bolts).
The CV joints should be greased with Moly grease (Castrol LMM for example). The actual wheel bearings in the brake hub assembly - two joints in each side - are greased with normal Lithium bearing grease (Castrol LM or AXPT for example).
For info, Moly grease is always very black and very sticky, and it's sometimes called EP (extreme pressure) grease - look for the ingredient "contains 3% molybenum sulphide" or similar.
Lithium wheel bearing grease can be any colour depending on the brand (Castrol LM is light brown, and Castrol AXPT is dark blue for example).
Make sure the axle nut is tightened to the correct 217ftlbs too (NEVER run it even slightly loose) - it holds the complete stack of spacers and wheel bearings together inside the brake hub assembly - there is no adjustment for play here.
If you disassembly the wheel bearing assembly for regreasing it's absolutely vital that the two fat ring spacers are placed in the correct orientation - they are "one sided". The long tube spacer between the bearings can go in either way - it's a plain tube. There is an article on my site (below) describing the regreasing of both the wheel bearings and the CV joints on the IRS cars - just search for "CV" or "wheel bearing" and you'll find it.
Regreasing should be about every 30,000km or every five years, for both the wheel bearings and the CV joints. They will last a LONG time it cared for properly.