Im sort of new to VFP. Im not an expert. But have you considered using
a multi-tabbed object? I just made a form with a 10 page tabbed object
and each page can contain any fields you like, from any tables
whatever.

I think I can visualize what you are describing with a grid, but
I havnt done that much with grids so I cant help. Id be interested
to learn how you solve the problem. Best of luck.