Need help changing the form_validation library

[eluser]php_princess[/eluser]
Thanks for the reply but isn't there still a way to alter the codeigniter core so I could do the above? I've read up on callbacks and it looks like I'd be copying and pasting the function code from script to script. My max_image_size() and min_image_size() functions are in MY_form_validation and I wanted to keep them there, if at all possible.