I paid and settled my credit accounts with the ass

Most creditors will not do pay for delete. And since your account in paid off, you have absolutely no bargainng power.

I think, it???s too late to send a pay for delete letter to the original creditor. Your creditor may not agree with this pay for delete agreement after 6 months. If you want to remove the negative items from your credit report, then you can make a written request to the creditor to update your account status as ???Paid-as-settled??? and remove the negative listings from your credit report out of goodwill. The following link may help you in this regard:
http://www.debtconsolidationcare.com/letters/goodwill-removelisting.html
You should also know that, credit score will not increase instantly after repaying the debt. This is because credit score will improve gradually with time.

A PFD offer is the same in principle as a good-will letter. The difference is that a PFD additionally offer provides $$ as an incentive for their good-will deletion. So you can stil send a GW letter.
With no remaining debt, there is no payment to offer in exchange for CR deletion, so PFD would not be appropriate.
Updating account status to paid in full or settled would both have no FICO impact. FICO does not score the payment of debt, it scores the derogs and delinquencies that occured along the way. Getting the status updated without deletion of the derogs wont improve your score.