Hi,
I am very optimistic on solving this problem,because a have 3 years working on CRM system like vtiger CRM.
I am the best candidate to deal with this project,
please let me know other information in order to solve it.
i can give you examples of works i have done in Crm systems including integration of web forms,
like updating neccesary fields on entities, integration of grids , exporting and generating files into zip ,sending emails on demands and other things,
Hope to win this project and to fulfill your expectations.