My guess is that you are trying to get refinanced and not pay mortgage insurance (given the comment about 80% loan to value). From the sounds of it, you should have no problem getting a loan, but you are going to have issues with keeping your loan under 80% LTV to avoid paying PMI.
In order to avoid PMI, you could geta 1st mortgage at 80% LTV and tack on a small HELOC for the additional funds that you need. Hint: to help your credit, get the largest HELOC you qualify for and only take out the money you need to take care of the shortfall.
The bathroom in the basement was probably noted, but becasue it is considered below grade, it is not given the same value as a bath on the floors above. Don't try to push the appraisal, you may end up getting denied because the lender has to approve the value. Let the professionals in this industry do their job.
Click on the directory tab above, select Mortgage, and you will get a list of local brokers. I am sure they would be able to help you out.