I couldn't see the attachment Brian mentioned available, but I have also managed to adapt DirectResize 0.8 to work with php5.3 - basically by going through the main class and replacing all outdated ereg functions with preg equivalents - for example:
open file assets/plugins/directresize/directresize.php
find:
$imgHTMLHeight = ereg_replace("[^0123456789]","",$array[0]);
change to:
$imgHTMLHeight = preg_replace("/[^0123456789]/","",$array[0]);
I'm not sure if the changes are exactly the same for 0.9, but they may well be.