K.M.
I can give you some advice! My daughter is the same age as yours! She was born 9/28/06. We have been trying potty training since 18 months also and she has really just gotten it down, at least for pee pee now, and not always. She does use the adapter and the stool and rejected the potty that sits on the floor. She almost always tells me or daycare when she has to go pee pee and when she sits on the potty she goes. Poopey is a little different. Sometimes she tells me when she has to go and we will go in, and I sit on the floor and read to her and tell her if she sits long enough to go poopey, I will give her a special sticker or sweet tart or something she likes. This usually works. I also found that when you can let her walk around without anything on. She will know she has to go and doesn't have anything on and she will ask to use the potty. This really works. I like you thought I wouldn't use pullups, but I do. She really likes them and feels special that they aren't "diapers" anymore. I do like Huggies over Pampers though b/c they have velcro sides so you can get them off and on without taking her pants off! Now every mornnig she wakes up and asks to use the potty. I suggest doing that and when you can put her on the potty every 2 hours and before bed. I'm a single full time working mom, so my time is limited with her, but daycare works well with her so I don't think it matters who is helping her. I hope this helps!
K. M