Tkinter and frame resizing question

[Laura Creighton]

I have a Tkinter screen that looks like this:
(sorry for the cheesy graphics; hope you have a
fixed width font!)

-----------------------
|                     |
|   big frame1        |
|                     |
|                     |
-----------------------
|                     |
|   big frame2        |
|                     |
|                     |
-----------------------
|  tiny frame  (with  |
|many control buttons)|          
-----------------------

When I use grid_remove() to remove a big frame, the window is
redrawn from the top down, and so my tiny frame moves upwards.
I don't want this.  I'd prefer to anchor the tiny frame to the
bottom of the screen and then have the top of the window rise
or fall depending on how many big frames I grid.  Does anybody
know how to do this?

Laura Creighton