I am developing a new tag within the "sales" tag (or within "system" tag of the ESHOP panel - i have not yet decided which is the proper) which is called "Stores". This will have very similar functionality as the "Customers" group. Its functionality is to allow users to select from a number of shops in order to purchase iindividually from the relevant vendor their product. Since i am new to the core functionality of the ESHOP component and its various code implementations (i have already implemented the relevant jos_eshop_Stores table within the php database). What would be the general guidelines to follow in order to alter the component in such a way as to introduce this new (checkbox selection group) within the various Shipping methods, so the customer will be able to select the store of his choice?
I attach a picture of the relevant database table.