First, the requirements for the position are based on actual job requirements and not your qualifications; Secondly, the salary of the position must be considered in making a final decision in this matter. Porting your EB3 priority date to a later filed EB2 petition is possible. However, this matter is best handled through a private [...]

At the outset, it is important to understand that belonging to either category does not, in one way, or the other, expedite your case! EB-2 [Employment based Second Preference] The EB-2 classification includes: aliens who are "members of the professions holding advanced degrees or their equivalent" and aliens "who because of their exceptional ability in [...]

Your priority date is the date of acceptance (filing date) of the substitute labor - January, 2002. Priority date is not always reflected on the I-1485 receipt.

Employment-based adjustment of status applicants (from any nonimmigrant status) whose I-485s have been pending for 180 days or more and who currently have an approved I-140 petition may change jobs or employers without invalidating the underlying I-140 or labor certification, as long as the new job is in the same or a similar occupational classification [...]

The USCIS will sometimes accept secondary evidence where letters from former employers are unavailable. However, you must as stated in the relevant paragraph from the RFE, explain and show why these letters are unavailable.

You can file an Application to allow your spouse to join you in your Green Card application up until the final adjudication or your Application to Adjust Status. In other words, it is not necessary to get married prior to filing the Form I-485, Application to Adjust Status. You are allowed to file an application [...]

Birth Certificate and Documents in Lieu of Birth Certificate You will need to provide a photocopy of your birth certificate and a photocopy of the birth certificate of each family member applying with you. Please be advised that each of the birth certificates must include all of the following information Applicant's Full Name Full Date [...]