Hello and welcome to JustAnswer. Please note: This is general information for educational purposes only and is not legal advice. No specific course of action is proposed herein, and no attorney-client relationship or privilege is formed by speaking to an expert on this site. By continuing, you confirm that you understand and agree to these terms.
I am sorry to hear about this situation, Syed. On this website, I do not always get to give good news, and this is one of these times.
The 2001 deadline you mention is for something else, entirely. That deadline refers to the Section 245(i) Provision of the LIFE Act. Basically, the law overlooks unlawful entry and unlawful presence when considering some Adjustment of Status applications for people who have filed before April 30, 2001.
This does not apply to a case such as yours. If she had a greencard but resided outside the country for more than a year, her greencard has been voided. As such, she has to be petitioned for again in order to get one, via family or employment.
Please note: If I tell you simply what you wish to hear, this would be unfair to you. I need to be honest with you and sometimes this means providing information that is not optimal. Negative ratings are reserved for experts who are rude or for erroneous information. Please rate me on the quality of my information; do not punish me for my honesty.
I hope this helps and clarifies. Please use the SEND or REPLY button to keep chatting, or please RATE when finished. You may always ask follow ups at no charge after rating. Kindly rate my answer as one of TOP THREE FACES/STARS and then SUBMIT, as this is how experts get credit for our time. Rating my answer the bottom two faces/stars (or failing to submit the rating) does not give me credit and reflects poorly on me, even if my answer is correct. I work very hard to formulate an informative and honest answer for you; please reciprocate my good faith with a positive rating.