G325A & Employment letter

I am filing I130 & I485 cocurrently for parents

I filled G325A for each of them. Do I need one for myself?

I include 2011 tax, and w2 for 2011, 2010 and 2009. Do I need employment letter too?

I am also applying green card for my sister. She is in china and can't file I485. Is checklist below enough?

Form G-1145, E-Notification of Application/Petition Acceptance

Check in the amount of $420, payable to U.S. Department of Homeland Security

Form I-130, Petition for Alien Relative

Copy of my certificate of Naturalization

Copy of my notarized birth certificate

Copy of my sister's notarized birth certificate

My sister is married. Do I need her marriage cerf , the birth cerf of her hu*****and/kid when filing I-130?

Thanks for masters!!!