Hi Hummer,
To automatically add rows to a repeating table requires code. We provide the free qRules 1.8 to do this. There are commands for inserting items into a repeating table and for copying a table from one place to another. Go to Qdabra.com->Products and download. Since it requires code, you'll have to Admin-deploy the form, but that isn't so hard (and in 2010 it doesn't require admin deploy).
Take care,