if you want, you can email it to me, and i'll do it for you...
otherwise, whatever prog your using, there has to be a menu that says "Image Size" or something along that line.
then you just change that size to 50x50 and bada-bing!
Microsoft Image Editor uses this method:
open the pic in MIE.
goto "Image"
goto "Resize..." click it...
from the 'Units' drop down box, select "Pixels"
change both "Height" and "Width" to 50.
there you go!