re: History of Credit Inquiries

I understand that the derogatory credit is 30% of my score while the inquiries are only 10%, however I am trying to improve my score overall and (vaguely) determine when my credit score should improve to my immediate short-term goal of 640.

I called a law firm that challenges creditors and credit bureaus. I have two accounts of Charter that were a reported as a month late. The other two are a small credit card that was 60 days and the big credit card that was 90 days. All are current and paid in full. I am hoping they will be willing to drop the account reports and/or will not have documented properly so that they can be removed.

My dad used one of these firms and had his credit score raised by over 100 points on 4 months. I have half the negative reports of their typical clients, and their typical client is only a client over the span of four months when their accounts are getting challenged.

Hopefully I can see some positive and near immediate results.