Custom Workflow Issue - Unable to pass a key parameter

Hi,

I have a custom form which has a profile number as key field.

now on submitting the form a profile no is created and a workflow is triggered.

I have to show the same form in the workitem based on the profile no generated to the approver in his inbox.

I have to pass the profile no as it is key field in the form to display the form in approver's inbox and that has to be passed the moment the workflow is started - so as to display the same in 1st approver's inbox.

so how do i pass the profile no which is generated the moment the form is submiited.

Workflow start - SWU_START_WORKFLOW.

Kindly suggest me in this regards,

shankar