Merge Multiple Access Databases

The task would require you to merge multiple access databases together while filtering duplicate records, whilst also keeping in mind that there may be more than one entry per customer but for different dates of work. Duplicates would need to be filtered out, bearing in mind there are varying entries for the same customer. The target is to eventually have one large database, although it is currently split into two subsets (both of which then have more subsets.) Prior to merging the two shop databases into one database, a field would need to be added to allow a viewer to tell which shop the customer had come in to. The field would only require either a "G" or a "B" depending on the origin of the database. For someone who knows access or SQL this shouldn't take long at all. please make your best bids and we will be awarding the project later this evening. The faster it can be done the better, a max of 24 hours; the quicker it's done the bigger the bonus I will pay once it's all been checked over and verified.