SharePoint 2010 Multiple Lists Submission/Edit Using SharePoint Designer

Question

Hi, I have 2 sharepoint 2010 custom lists:

List A (Customer Info) Columns: Title, Customer Name (Signle Text), Group ID (Choice)
List B (Server Info) Columns: Title, Server Name (Single Text), GroupID (Choice)

Relation between list A & B is one -> many, one customer has many servers (related via GroupID of 2 lists)

My goal is using SharePoint Designer 2010 design a single form that allow users submit both customer info and server info at the same time. On the form, user also able to add repeated rows for multiple server item.

Second, user able to open the item again and allow them to edit and save both customer and server info.

I checked the following related articles:

http://social.technet.microsoft.com/Forums/en-US/sharepoint2010customization/thread/1ac896d7-522d-43fc-a21d-8fc56380704a/

http://manish-sharepoint.blogspot.com/2009/04/inserting-data-into-sharepoint-list.html

but it did not address what I am looling for.

Please help.

Thanks