xml and csv inetgration in to oscommerce

client site is based on oscommerce ms2. My client site uses two different suppliers at the moment. one of them offers a download in xml and the other is emailed to him in a csv format. the xml list includes all the product details apart from product [login to view URL] discription are available at the supplier [login to view URL] the moment the file is downloaded from supplier wesbsite and uploaded via easy [login to view URL] products are the added to the appropiate [login to view URL] also also available from supplier site. The csv files contains all the product [login to view URL] is also uploaded via easy populate. My client wants to auto update these two [login to view URL] stock gets updated when the supplier updates his [login to view URL] would also like to have the missing product disciption added to his [login to view URL] would also like n option where he change the prices of the catalog as often as he likes sample xml and csv file is available on request.