PHP master needed to write user-friendly script

We require an expereienced PHP/MYSQL programmer to write a script for an existing website. The correct candidate will be a freelance script writer with an excellent knowledge of PHP and an understanding of Acrobat and FDF. The script will also need to be heavily indented with instructions so the script can be adapted and changed by non-techi clients. UK Residents only. Please give examples of similar work and details of charges/fees. Further work will be available.