cs cart multivendor version 4 - customization part 3

the total development we need could be changed into following Module, and we want developer to do the module one by one 1. MODULE 1 : Some minor changes on the admin panel , (i) admin login url to be changes and such a system that we can change easily that url if we want (ii) vendor login url to be changed (iii) email setting up (iv) vendor application has additional three things :- bank details or permanent address, know your customer form, upgrade option 2. MODULE 2 development of page : GET AN ESTIMATE, this will be a form based page, but ones a customer fills it, automatic email goes to all the vendor who provide that service or product based on the choose category. this new requirement will reflect on a new page called BUY LEADS. The vendor can also go to this page to browse any new lead that fits their expertise or product range. 3. MODULE 3 development of page : SECOND REVIEW, this is about a client or customer can take a second review from an expert on a particular doubt or subject or consult the vendor for any expert opinion 4. MODULE 4 developing a price format, of NEGOTIATION and another format as DROPPING PRICE 5. MODULE 5 upgrade functionality of vendor 6. MODULE 6 CUSTOMER can buy some add on to facilitate their requirements 7. MODULE 7 integration to payment gateway.