In my divorce we just filled out the forms the family court had. We split things the way we saw fit. I kept my 401I and pension, the firm didn't even ask how much it was, I just checked a box saying I got to keep it. Basically what ever you agree on they will sign off. I provided 85% of the financial support in our marriage, they don't even ask how much you make in the papers.
I suggest getting the Co-poetioner form and looking it over and talking to family law.