custom pic montage script- website

ok so I would need someone to create a scipt which allows users all over the world too upload images to a set grid... however users can upload over each others images and such and replace pictures. The website becomes a moving image box almost and anyone can upload pictures etc...when highlighting over a small picture it will appear larger"see pic" etc... and users will have the choice to reupload over that image etc ..... ITs hard to explain: You would for one need to contact me via PMB to discuss it further also.......... the project ammount is low at current however could be increased or long term payment can be arranged Depending on quality and confidence I have in the scripter. It is probably best created in pearl I am looking for someone who will be willing to help throughout the entier stage and perhaps web deisgn and implementation will be needed. thankyou