Insert Rows Macro

Hi,

I'd like to do the following with the attached file:

1. Click 'ADD PRODUCT' button which will ask the user for the name of the new product and adds it to the last row of this list, e.g. 'Product E'.

2. Click 'ADD PRODUCT DETAILS' which asks the user to pick an existing product and then adds a new row to the end of that product's rows.

The attached file is just an outline of how the data could be arranged and is not set in stone...

Any help would be greatly appreciated...