You need to use calls to the relevant Parent object in the frameset, to replace, check out Javascript. For example, if you had a frameset with two frames (left and right) you could try from left :
Code:
parent.location = "http://www.greggriffiths.org";
If you are calling it from the opening page then I think something like :
Code:
newwindow.location= "http://www.greggriffiths.org";
should work.