contest script

I need a photo contest script created for my website. The design and overall idea of it needs to pretty much mimic this script: ([login to view URL]) My site currently runs on the Wordpress/Buddypress platform, so the script you design needs to work one of two ways. I'll let you decide what one is better and cheaper for me. (i expect a quote for both in your PMB) You can either, run the contest script on a sub-domain of my website, but to do this, the sub domain would have to be connected to the main website so the user signs in to both sites when logging in to either one. Or, design a Wordpress script that allows for these features within the main website.. I'm interested in any other ideas you may have to successfully do this project in the most cost effective, and efficient way. I'm looking for a long term partner in this, as the website will be forever growing and the work will be plentiful. Good English is a must.