Here is my situation, I have an approved I-140 from a former employer (was laid off before filing I-485). The old PD is 3/2001. My current labor was approved last month after 2 years of waiting (w/ PD of 1/2004, thank GOD!). Have read from somewhere that one can retain the old PD if the I-140 was approved. Has anybody really done that? If the answer is yes, what kind of evidence should I provide? Can I do concurrent filing? Many thanks...