CRM Lead Customization

Microsoft MS CRM 2011 Lead Customization We require a basic custom solution for the "Lead entity" in MS CRM 2011. Our CRM is a fresh implementation, and as a starting point we need a lead to have more than one contact (by default a lead has a single contact only). We plan to import our data from existing CRM into MS CRM and need the ability to store multiple contacts for leads. If a Lead converts to an Account, the solution must also convert the "Lead Contacts" into "Account Contacts". The process of creating an opportunity from a lead must also still function as expected. This is an urgent requirement, and we would the successful bidder to complete by month end if possible.