How to use Two Different Times steps in Solver Parameters?

Dear Sir,

I am using COMSOL 3.5a.

And I am running my simulation for 6hrs.

But I want to run my simulation in two different time parts. (i.e. for 1hr i used solver parameters for time stepping range is (0,1,3600) (i.e.first value, step size, last value). with initial time step 0.1 and maximum time step is also 0.1.

Now for remaining 2h to 6hr i used solver parameters for time stepping range is (3600,10,21600). with initial time step 0.1 and maximum time step is Auto.

And all this changes I have to do in one single simulation run only.

Whether it is possible?

And if so can you please tell me how I have put or changes all this value in my solver parameters.

Thanking you in advanced.

Vinay Patel.