Custom Project WHMCS Hook & CSS - repost

We need a WHMCS hook to work in the clients area to check whether two custom fields in the product selection are equal and then assign the input value as the WHMCS password. Here is the detail of the 3 steps by the hook: We need a hook for our WHMCS to run in the client area to do the following functions 1- In product configuration: We have a product password (Different from WHMCS password). We want the hook checks the password & confirm password to make sure they are equal. 2- Captures the password in step 1 and assign it as WHMCS password (for the client) 3- In step 1 clients use their email as their username. We want to capture that email and assign that as their WHMCS email address. In addition our WHMCS page (headers, footers, order page, etc.) needs some tweaking to be matched with our wordpress design. The matching is minimal as we have already done most part of it. So we just need some tweaking. It's NOT a design job. You should be willing to communicate with us via Skype, Google Talk, or phone. Good English skills is a MUST!