create megawizard components without megawizard

Hello all,

I am trying to do as much as possible with the commandline and tcl scripts. Now I know it is possible to create some already defined component with the megawizard, but I don't know how to create this component without the wizard. I have found the tcl files and a Verilogfile, but I don't think i should change the Verilog file myself. How do I know which information I should transfer to where? For Example I am trying to use the pll and give it two output clocks, how do I define these clocks?

Greetings,
ZeMoi