I'm SO sorry for bringing a dead post from over three years ago but I'm in the same situation as LuciDreamer, I was wondering if I can use the same situation now (three years later). It is REALLY difficult to understand the desperation of a parent in this situation and I've been to different lawyers and some of the them don't event heard FTJ before and I need to educate them (the little I know), one even told me I can't apply for FTJ because when we started my I-485 I selected not applying with me for my daughters. My green card has been issued 5 months ago and my daughter has until the end of September to leave for her B-2 visa. I'm really really scared and not sure if I follow the same procedure listed here. One lawyer from a Hooyou site did mention the I-485 instead of going the I-824 but I thought it was too good to be truth, now I'm having second thoughts about it.
Again, I know that this is a really old post but if any of the original posters is still reading this it will make a huge difference if you still think this could be done again.
Just as an FYI my daughter has been for less than 90 days in the US so far
Thank you SO much.