pack manager was never my strong point. I need to pack items A,B,C,D (etc) in a frame in the following manner (basically a two by n grid): 
|--------------------------------------|
||----------------||------------------||
||       A        ||         B        ||
||----------------||------------------||
||----------------||------------------||
||       C        ||         D        ||
||----------------||------------------||
|                . . .                 |
|--------------------------------------|

[download]
So far, I've tried various combinations like but that's not right 
A->pack(-side=>'left');
B->pack(-side=>'right');
C->pack(-side=>'left');
D->pack(-side=>'right');

[download]
Each row of two widgets is added from a routine, so I don't necessarily know what, if any rows were packed before. Please help :-)

In reply to Tk::pack help by gri6507

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