Oh I dont miss those days! I too used to go out with Rory, it would be cold and neither of us wanted to be outside. I tell her "go potty, go potty" and she would just press her nose up against the glass wanting back in but I knew she had to go! I wouldnt go back inside ever, until she had pottied.
So one night it was to cold to sit there so I nonchalantly grabbed a tennis ball and started bouncing it against the house, i turned around and she was peeing! The next time I pretended to be potting flowers (yea liek thats what I wanna do at 11 pm in the freezing cold) but she went! I'm know this sounds crazy, hey it might not work but it might. Maybe she figured "well as long as were out here" or maybe the pressure was off of her and she couldnt feel my frusteration anymore. I dont claim that this a sure proof training method but its worth a try maybe. Praise Praise Praise!
Oh and after that we did the bell trick. I hung a bell by the back door and before I would take her to go potty I would grab her paw and ring it. It only took about a week for me to be in the kitchen and hear that ding dind ding....man I was so excited! The only down side to that is they may eventually learn to use it when they wanna go chase a bird, hear the wind, or some other crazy reason for wanting to go outside, haha!