How to associate workflow approval using asp page

Anyone,

I've created a transport claim form using Infopath and uses the OOTB Workflow for approval process. (Sharepoint 2010)

The workflow approval process by default uses infopath form. How do I change the approval form to aspx page, so I can use an infopath webparts to attach the claim form.

WHY? When the form get submitted, the approver wanted to see the claim form displayed inside the approval form without clicking or opening another window to view the claim.

Another OPTION : If there is a way to view the submited claim infopath form in the approval form will also works for me.

Another OPTION : Use the same submitted claim form as the workflow approval form.

Thanks