Hi oswald,
could you give a little more information about what it is you would like to get done. I am a php developer and might be interested in taking on a little modification task, but some more detailed info on what excactly it is you want to be modified and what the payment is you have in mind are needed.
Since I work as a PHP developer for a company specialiced in devoping software applications I might not be the cheapest option, especially since this board has many people who might want to take on a little task like this. Just let me know if you have some more details for me.
Cheers,
Vraxor