Drupal module node import

[login to view URL] that's the link you have to create a module for database import (xls files) i have to be able to import files every time i need them and when i say import i also mean update old nodes with new ones as nodes all the records belong to two different content type some fields to one and other fields to another content type see the file attached now you'll see 2 tables for any file i'll sent you there are always 2 tables TABLE : "data collection" is gonna be "product content type" EXCEPT: field C (url) WE DON'T NEED THAT and table "Dance school original" goes to another content type "service provider" BUT bear in mind that field "name" is also a node reference field in product content type that is the "reference field" let me be simple the product products refer to the service provider...... that's the reason why we created the reference many products same service provider File title will create a subvocabulary(parent term) in the vocabulary "service catalog" keyword fields will be imported in meta tags AND in the filter "service type" (the one in the homepage) of course the module must be 100% working, with all the functions describe