Create website to capture e-signatures on documents

Create website to capture e-signatures on documents Step one is to create signature capture system like [login to view URL] (can use open source code)Step two is to create a web site very similar in work to [login to view URL] The code has to be in PHP only (LAMP). Website modules are 1. Registration / sign in (lost password etc.) 2. Upload document, send to client by email to sign and return document with signature to the originator 3. The originator shall have a "My Account" module where in all his documents are stored (as attachments with signatures). 4. Payment gateway (Cart & Checkout) 5. Email transactions where each step in the transaction is emailed to all parties (encryption required). 6. Storage of all transactions. Performance bond of ?% may be required. We can provide complete design in .PSD and or complete front end if that is a limitation for the prospective coder.