Family based visa petition question

[jcpower]

Hi...this is my current situation:
I am an unmarried son over 21 and my parents are permanent residents and they filed for me on August of 2002. I am from South America. On September 2006 I got my approval notice. I guess currently I fall under the F2B category and I see the current processing date is around 1997. My parents are about to become citizens this year. I am currently working in the US with a working HB visa.
My question is: Once my parents become citizens, the plan is for them to file for me now as an unmarried over 21 son (category F1). Will I be placed at the back of the line or is there a way for me to obviate that and enter the new line at a more advance position?? Will a good lawyer have an influence on this issue?
Question number two: What happens if I have children with my girlfriend eventhough I am not married?
Question number three: At what point can I do my Adjustment of Status? Is there a way I can remain in the US until I receive my GC given the fact my petition has been approved?
Thanx for your help

[pirate]

Pls tell me how you got to be in US when your petition is still not current ?

I have a daughter who is more than 21 and our petition is pending for visa at the local embassy. But we fear that our daughter will not be eligible under that and are wondering what other options available for her to be there with us.

Thank you in advance for your info.