File Uploading .ZIP .RAR

[eluser]jmadsen[/eluser]
Assuming you mean the file uploading class?

1) library hasn't changed that I'm aware of, so older results should work

2) no idea why you need to "hack the core library":

$config['allowed_types'] = 'gif|jpg|png';

http://ellislab.com/codeigniter/user-gui...ading.html

should do what you are after.

perhaps you should explain your problem a little more?