Starting SharePoint Approval Workflow With Data in SQL

Question

I am working on automating a license process fro my organization. With asp.net I am able to create a WebPart that submits data to a database in SQL. Now what I want to do is to initiate the approval workflow with that data. My data has a lot of attachments(10) and I realized I cannot pull these into a SharePoint list to initiate the workflow from there. Which steps can I take to achieve this without using Windows Workflow