PHP Programmer Needed to assist in scripting Contest Driven Website

I have been working on a website that is contest driven and have come to a point where it would greatly benefit me to have some assistance from another experienced PHP Programmer. Here are some of the tasks I will need help with and each portion of the project can be worked on in separate sections. Contest Voting Script - (Members can join contests only after either purchasing credits on the site, or having credits sent to them by another member. Once member joins contest they can upload a photo that gets voted on. Votes get added up with Activity points and who ever has the highest total wins the contest and wins all credits from everyone who joined the contest combined. I would like to change this so members can upload galleries of up to 4 photos instead of just one.) Activity Points Script - (Once a member joins a contest, they are able to earn points for activity with their sponsors and throughout the site. The first Part I need help withis Sending a gallery of up to 4 images to the members who sponsored them with credits, each image they send will attribute to one activity point earned in the senders profile. This will give sponsors some incentive to send credits to the models on the site because they will gain private images from the models and models will earn points for sending their sponsors images.) Leaderboards for Contests - (Outputs to show winners based on adding votes and activity points on contests. Winner of each contest will be chosen automatically once contest ends depending on who has the most activity points and votes combined.) Facebook Integration - (so members can login or signup with their facebook account. Member images can also be pulled in from Facebook as well as username and other basic information if they choose. This is something I will want to have programmed in after the above parts are completed. ) There are other parts of the site that will also be added later on, if I find a suitable programmer I can work with them in building new sections of the site.