CRM 2011 Sub-grid for Price List Matrix

I am trying to add feature to Price List entity to support matrix based price lists. I had created Price List Columns and Price List Rows entity and added 1-N relations to Price List entity.

Now i have to add a subgrid in a Price List form (probably a new one) to let users fill matrix. So i need a grid that fetches and inserts columns from Price List Columns relation and fetches and inserts rows from Price List Rows relation.

Is this possible? If yes, how can i achieve this?