I have an approved I-140 (NIW, RD 8/31/05, AD 9/22/05) and the cocurrently filed I-485. Now I also got my LC certified on 11/18/05 (EB2, with PD 2/24/03). I'd like to file anothor I-140 (based on my approved LC) to get a priority date of 2.5 years earlier. My question is I need to file another I-485 (based on LC) or I can use the same I-485 (based on NIW)? TIA