Hi itsjohn,
You could try a few methods, the first would be to try using the php ini_set function from within the php files directly, the code would be something like (this equates to 1mb in bytes):
Code:
ini_set('upload_max_filesize', '1048567');
Although the above ini_set function is generally not considered to be the best method.
You could also try a .htaccess file or the declaration within the <directory> settings in the vhost configuration within httpd.conf
Code:
php_value upload_max_filesize "1048567"
I am no expert, but this may help you. Hopefully some php gurus can clear this up if I am way off track.
Asciant