VAGCOM Noob. Couple of questions.

[reevesroadster]

Ok, Ive been through the manual and had a play with VAG-COM and got a few questions.

How safe is it to "play" with the advanced settings - the manual seems to imply these are potentially dangerous.
Is there a list of WSC codes anywhere - and could this be used to verify servicing/repairs on the car.
Is there a summary list of typical tweaks to settings for the B7 RS4.
Is there a stock set of RS4 measurements so I can compare to a confirmed set of measurements. (I have no fault codes).
Anyone use measurements like the oil readings to verify their oil, as oposed to checking with the dipstick, for example.

Im sure there'll be more.....(and I did read through 7 pages of threads)...