I tried the parent window stunt - didn't solve my problem.
Want a sad muppet example??
Internet Explorer, menu at the side "Games" (click), new window opens at new window size - click on any particular game, another new window opens at same size.
Microsoft (being Microsoft) say "Do you really want to play this game". Click "play now" and yet another new window opens - but too small and will not resize or maximise.