Openads integration/customization

We need to customize our installation of Openads 2.0 There is plenty of data in there than cannot be lost. We require some extra columns to be put into the data fields. Currently there is only impressions, clicks, and CTR. We have a database of userid's and need an extra column "Sales" linking into that database, and a column saying "ROI" - calculating the conversion rate of clicks to sales. This work will also lead to future work, as we require periodic maintenance and upgrades to our server. Please only bid if you are able to complete the work asap.