Soo... are you concerned about something specific? Go to departure hall (3rd level) straight to the check-in counters for your flight (there will be separate libe for medallions and business, of course). And then, umm... check in Nothing special here. Then passport control, security checks... 2 hrs should be fine. But (if you're driving) be aware of traffic on Leningradskoye shosse. Double check before you go.