Magento: eshop auto update

DARE - Supplier CICERO - purchaser = our company with web eshop [login to view URL] Company DARE has ftp with 2 files: [login to view URL] - catalog of product with attributes (without stock) [login to view URL] - overstock Little dictionary : ("katalog" means in English catalog) ("sklad" means in English warehouse/stock) (“kod” means in English code) (“skratka” in English = shortcut) We need to make a script that automatically downloads both files from supplier FTP account. He reads stock from file [login to view URL] and automatically import them into our magento eshop. It must execute as follows: - [login to view URL] file uses only code "<kod>”. Our firm does not use this code <kod> in the products, therefore the script must use the file katalog.xml. This file [login to view URL] contains code "<kod>" and also code “<skratka>”. We use only <skratka> code on magento eshop. The script must perform the parsing <kod> to <skratka> and then update the products through <skratka> from file sklad.xml. (<skratka> code isn’t stored in a [login to view URL], which contained stocks, but this must read from a file [login to view URL]). Task No. 2: - the script updates all attributes of each product (color, description, price, etc.) - If there isn’t such a product, add it automatically (magento do it automatically self, if you are importing data) - If it finds a product which stock = 0 and at the same time it has set attribute “to run out" = ”Yes” (in Slovak <DO_VYPREDANIA>=”Áno“), the product stops running. This script must be programmed to not fails. File [login to view URL] has 20 - 25 megabytes of data and it seems difficult for php. It is therefore necessary to use stackable data processing or other programming language that is ultimately output in php for magento. This script will run every 4 hours automatically. Attach.: [login to view URL] = contains descriptions about files katalog and [login to view URL] ("<zbozi>" in english means product and every line is one attribute) [login to view URL] [login to view URL]