Unfortunately, Jeff is so right in his reply below.  But having been in
the car business for decades, I've actually had good experiences, for the
most part, when it came to dealing with adjusters in circumstances like
this.  Dig out your bills;  find cancelled checks; write out a statement for
a couple of mechanics who did the biggest work--and let them know you need
this to preclude having to summons them to court: that way, they'll be
happier to cooperate and sign those VERY factual statements.
   And remember the adjuster puts on his (her) pants much like you do.
Talk to them.  Plead with them.  Keep cool.  Don't get up tight or mad or
defensive.  Stick to the facts and the adjuster can more nearly identify
with you.  Let him feel that you are looking to him as YOUR go-between--as
YOUR representative--and discuss with him what WE can do to help reach a
more nearly fair settlement than a blue book might lean towards on this
unusual situation.
   Good luck and may you make a new friend with this adjustor!  Remember
that he enjoys leaving a customer happy.  Plus one more thing to keep in
mind: often this adjustor is not employed by the ins. co. he represents.  He
often is like a self-employed contractor.  And often the face he sees is NOT
the ins. co. rep.--that part of the dealing is over the phone.   The face
that he definitely sees is YOURS.  And you can use this personal,
face-to-face situation to YOUR advantage and have him actually looking out
for you!.  s