That would be nice. And remember to add the other windows that do not need to be there like the confirmations for registration, rebuys, etc. They are a PITA sometimes.
IMO, you only need two extra windows. One for your promos and one for the Cashier and Account stuff. In the case of the latter, things do not flow too well or look out of place when navigating. Like frames within frames within frames.
Also, you guys are still opening my browser when I exit the client software. Shame on you. To compound that problem, there are no ads to serve because the server is not responding. Very tacky of you too.