dawn software integrate bias and flat pictures

[pechinot]

I have recently bought a 414 atik.
I'm interested in the dawn software.

I understood roughly handling the software but

You create such a dark master, but never mind the master bias (alias " offset" in IRIS software) and the master flat

How to integrate the master bias and the master flat in the workflow to recreate the classic sequence bias- dark- flat, and then purifying images?

Can i have a pattern of workflow to introduce these items of bias and flat in the sequence of treatment for mono chrom pictures? ( rgb will be easier to build after)

Thank you