All I can tell you is how I did it with my daughter (who will be three in a bout a month). We potty trained her about 4 months ago, and it went pretty smoothly, though not without a few hitches.
First, about a month before we began, we told her that she was getting to be a big girl, and that the diapers were going to go away soon. We told her the day they were going away (not that she really understands dates, but it was made clear as we approached). We got a few potty training books that she liked…a Dora the Explorer one, and one with pictures of a real girl on the potty so she got the idea. She liked that one a lot, as it described what happens, how she gets to have big girl underwear, and even describes accidents and that they’re OK as long as you’re trying.
As we approached the day of reckoning, she was actually relatively excited about it. We waited until my wife, who is a teacher, was on Christmas break and started that first Saturday.
My daughter woke up, took off the diaper, and was put into panties. We tried sitting her on the toilet about ever half hour or so, but that quickly became an annoyance to her, so by the end of the day we were just asking if she needed to go. That first day, she had five accidents…all pee. The first two she didn’t even notice and we had to point out that it was running down her leg. That was fun. We had a few ‘I want a diaper!’ screams, but we told her that they were gone, and we only had enough to use a night. However, by the end of the day, she’d gone in the potty 3 or 4 times on her own and only had one accident in the later part of the day. We also bribed her a little…the one book had a ‘star chart’ that she got a sticker every time she went, and big stickers ever 10 times. After 40 times, she was an official ‘big girl’. She loved getting the stickers and putting them on the chart. She also got either two chocolate chips or two mini-marshmallows. (we phased that out after a few days) We used a pull-up at night because we still didn’t think she’d be OK at night for a while.
The next day: 0 accidents and a poop in the potty. She’s been fine ever since. We took the pull-ups away at night within a week, because after she learned to use the potty, she was dry every single night…took that away and she’s wet the bed once in the four months that she has been potty trained, and that was the first month.
She has, of course, had the occcasional accident here and there, but it’s quite rare. I will say that she tried to use poop as a weapon to get out of going somewhere she didn’t want to go that first week. My wife was telling her how she was now big enough to go out places…and we were going to go visit some people. She pooped in her pants twice that day…on purpose, because she didn’t want to go and figured she would show she wasn’t ready to get out of it. My wife caught on quick, asked her point blank if it had anything to do with the visit, and she said yes. My wife said ‘well, you can poop in your pants all you want, but we’re still going.’ That put an end to that.
We did go through a self-induced constipation bout when she had a hard poop early on, and she basically didn’t go poop for about 4 days I believe…talked to her pediatrician and had us note if there were bad signs, and if not, this wasn’t uncommon. Eventually she went again and has been fine since.
Since your daughter is a bit older, I’d say just take the pull-ups away entirely, and if she won’t poop on the potty, just let her poop in her pants. If there are characters on the panties, you may remark “oh no! You pooped on Dora (or whatever)!” If she is defiant about it after a while, make her clean it up (obviously supervise to make sure she doesn’t ruin clothes or get any on herself where you don’t know where it is to clean it off). That should work well quickly, I’d think. May daughter at one point thought it would be funny after she was potty trained for about a month to tell us that she hoped she pooped in her panties because it would be funny. We flat out told her…you do, you’re cleaning it up. She’s never followed through because she knows we’ll do it. We’ve never actually done that for a real accident, but if she does it on purpose, you’d better believe we will (and of course, we would ensure every part of her was well cleaned afterwards).