Write some Software

Basically all i need is someone who is familiar with image magik or gd library. I have a photo based website and am looking to add square thumbnails. Current the admin system has a crop function but only for height and not for the width. As there is nothing in the admin system to crop the width the code for this would need to be added into the php file that contains the code for the crop function. This is a simple job for someone who knows what they are doing. Keen to get this done straight away as its been bugging me. Thanks