I potty-trained in the day care setting for about 6 years.
If she did that well on the first weekend, why slow her down with the confusion of the pull-up. I agree with the training pants. You can use the "pretty" panties and character panties (Barbie, etc.) as a reward for being such a "big girl". Then you can use them as training pants covers until the day comes that she is ready to wear them alone under her clothes. Just remind her that "Barbie does NOT like tee-tee or poop (use whatever words you use for these) on her head."
Another important thing to remember is that she is going to need to be able to get undressed pretty quickly. Be sure to have her in dresses (and remind her to pull them ALL the way UP) or elastic-waist shorts. Overalls, belts, buttons, etc. are BIG "no-nos" until she can hold it long enough to wait for help.
Be CONSISTANT. Set a timer if you have to. Don't ASK until you can trust that she KNOWS she does or doesn't have to go. When the timer goes off, it's time to go -- no ifs, ands, or buts. When success is frequent, lengthen the time about 5 minutes to allow the bladder to strengthen and be able to hold it longer. I suggest 1 week at each time level increasing 5 to 10 minutes each week until she is able to TELL you she has to go.
Keep with it. :o)
P. <><