If you've got automatic dressing control of some sort, you are ahead of the game. Off the top of my head, here are some parameters and tips:
-Make sure your dressing bit still has some diamond in it. Grind it so that it is shaped like a blunt knife, with the "edge" a bit wider than the diameter of the diamond shafts, and the faces laid back about 60 degrees.
-If you have some form of manual advance, set up the bit so it is about .5mm (.020") "into" the stone radially. If you have an auto advance mechanism set the bit up so it is barely grazing the stone.
-You should be able to find some info on patterns with web searches (check the wintersteiger forums and so on) but they are an interplay of stone speed and dressing bit travel speed so it varies on the diameter/speed of your stone what range of values you should try. If you get sooper-desperate and can't find more specific advice, try running the bit across at between 7 and 13mm/s at your highest stone speed, which should give you an idea of what to look for.
-Use good emulsion, should feel slightly slippery to the touch.
-Make sure water is on high before dressing, and make sure the nozzles are clean and wetting the whole stone thoroughly.
-Remove tickers with something like an old plastic scraper.
-Test with some tuned/skied out skis.
Good luck! Sounds like fun.