urgent, please help. thanks

My job is going to be over at end of Feb. 2010. I-140 -EB1a was approved.

My questions:

1. can I file Form 485 for myself right now even if the job is going to be over at 2//28/2010?

2. If I can, can I file 485 for my kid later even if my 485 is approved?

very urgent , many thanks