Cow's Milk and Weaning

So my little one will be turning one (gasp!) on Saturday, and I'm hoping to wean her shortly after that. I know that breastmilk is excellent for her and all, but I've been struggling to keep weight on and she doesn't take a bottle (I got lazy when she was about 6 months old and didn't pump for a couple of weeks, and when I tried to give her one she'd forgotten how to take it), so I can only leave home in certain "windows." My husband and I are looking forward to going out on dates that don't have to start after her bedtime feeding. =)

So here's my question: for those of you who have done this before, how long did it take (days, weeks, months), and did you have to get our kiddies settled on cow's milk first? I know you're technically supposed to wait until they're 1 to even try cow's milk, but I cheated and tried it last week from her sippy and she was very uninterested! She did have a little though, and didn't seem to have problems with it (she doesn't have any other allergies, so I figured it would be fine). Any suggestions for introducing cow's milk or for weaning in general?