Qsys simulation

I saw the movie for Qsys simulation.

http://www.altera.com/education/demonstrations/qsys/simulation/simulation-online-demo.html

this movie tells you how to create testbench for Qsys system.

in this movie, when Modelsim comes up.

I can not understand where those script from.

I think those files ( such as top.v test_program.v load_sim.tcl) should be written by myself.

but, this movie does not tell how to write what should they be.

then I am lost ....

is there other way to learn?