Workflow Attachment ?

hi,

I want to generate workflow at the time of changing sales order that i did through start event concept.

But what i want next is, i want to put user decision to check the changed sales order document and approve / reject it. i put user decision step even.

But my problem is that, i want to show user the changed Sales order document jst like we see in VA03. and after looking at document user should take decision for that. how should i attatch the sales order document with decision step?

Plz try to resolve my prb.

Thanks in advance,

Saurin.