dataimport

hi, i need a create a data import from one catalog in XLS to oscommerce, the data change every day. need import: code from my provider and adding my code.. product title products description insert into a category. price from my provider and adding a plus. ( my database have 5 diferent price types) when make the import need update the stock.. when the products ist not in the xls delete. import the picture. and need make a second data import moore less same concep but the file is in XML pls give me your best price, have another proyects and update 3 websites.. thanks and best regards