I use "Set timecode at Now" action a lot so it is now what i am looking for. I want to set specific measure as project start time at ruler. For example i want to  set 5:01:000 as 1:01:000 then ruler will look like "-5, -4, -3, -2, -1, 1, 2 ..." and  I'll have 5 count-in measures. How can i do that?

Basically, you can't do that in Sonar.