How to make parallel tasks in a workflow

I have to

make a Workflow for document feedback on SharePoint.

Let me

explain my problem:

To make real parallel tasks in the workflow I have

to duplicate the document for each workflow user in a folder called “working”. Each

workflow users have to make comments in their own document. When all the users have

completed their tasks, the administrator read and merges all documents.

My question

is:

How do I assign

the workflow to each document and user?
Do I have

to create a workflow for each duplicate document?

I draw my workflow for a betterexplanation

Main Doc
|
Work Folder

| |
| |
Main Doc copy1 ........... Main Doc copyn
| |
| |
Make Comments Make Comments
| |
| |
User1 task completed Usern task completed
| |
| |
| |
| |
|
Workflow Completed

Thanks.
Sam

[1322 byte] By [Samuel369] at [2007-12-23]