or https://github.com/moxiecode/plupload
NB: circumventing any restrictions imposed by a web host is very naughty.
JQuery also has a number of ready made plugin scripts like Pixastic that can resize images client side in the users web browser before uploading to the server that may be worth exploring further.
WordPress has a preset limit hidden here...
wp-config.php -> define('WP_MEMORY_LIMIT', '25M');