Uniform avatar dimensions

[Jawelin]

Hi. I installed most of avatar-related hacks and uploaded many many avatars (categorized) to my board.
Most of them are animated gif, very nice.
Well, now I would make them displayed uniformly, i.e. some are larger than others.
I saw the 50 pixel affects only the uploaded avatar dimension, but I would resize all the images larger than 50px to that limit, without deforming them

Is there any hack or other way to limit everywhere the size of those avatars ?

Thanks a lot.
Bye