as far as i understand... you have two similar sites to start with. one mother site and one child site. on the child site the data is stored in csv files (well space can also act as a CSV delimiter) you have an FTP access to the child site. the mother site is regularly updated with all the product information. the same changes must be reflected in the child site. am i correct ? if that is the case... create an rss feed in the mother site which reflects ALL changes made to the site. step 2 in my previous post. on the child site make a php file to read the rss generated by mother site, parse it, and make similar changes. step 1 in my previous post. Note: Here CSV files are acting as a substitute to MySql to store data.
