game ladder fix

I have a game ladder system on a site already but there are some things that I would like to change such as: being able to challenge only 1 player at a time leaving the other player waiting. Both recipients must reply and if they do not it leaves the other player stuck waiting. It only supports 1 challenge and I would like a system that is multiple challenge. Our reporting loss system is alittle messed up because if the loser does not want to report there loss then it leaves the winner unable to finalize the match or accept any other challenges. I also am mainly set up for only one platform i.e. xbox 360, I would like to use several platforms. My system is also in mySQL and PhP scripts, leaving it very difficult to edit or spice up the site. I am looking for someone to create me a gaming ladder system that supports all these things as well as the things on my site already, if you could not reconfig what I have. I would like to be in the competive market like [login to view URL] and gamebattles.com. I am a gamer that would like to make a gaming ladder and create my own community. To get an idea of what the site looks like now check out www.dominatetheworld.info.