| Hi Frank,
You should be able to fit the wireless PCI card in your PC anyway. I do all my router config via a browser and have never connected the pc to router other than wirelessly, so even if you have to change the firewall settings later I should imagine you can do so by a browser interface.
I can't help with the firewall stuff as I run sygate on both PCs and it seems to do the job well enough.
Cheers,
Ali | 
Threaded Mode