Add HOLE PUNCHING to bitorrent project (REPOSTED)

I have a working executable written in C that uses bitorrent protocol to transfer files from computer A to computer B with the help of a private torrent tracker. Application works fine but when UPNP is not available on router it requires the user to manually open ports in the router. I want to implement the technique called HOLE PUNCHING to avoid this and get it to work in almost all conditions 100%. In detail I need to include PEX through (probably) modifying the tracker to my needs (it will be a private tracker anyway) and/or installing an "always on peer" on the same server that now holds the tracker. This always on peer will need to have info on files but NOT real files as I don't want heavy traffico on the server. This is just a part of a bigger project. If this part is done FAST and CORRECTLY there will be more tasks. Please apply only if you... 1) You are good in C++ (and .NET needed later) and have strong experience in transfer protocols 2) You are a single REAL freelance individual not a company 2) You speak english 3) You will be available on skype when working to live exchange files and info Please DON'T apply if you... 1) Have no experience in transfer protocols, bitorrent, ports, routers, etc.. 2) You are a company or a middle man 3) You have a daytime job and will work only in your free time 4) If you are not available from 9.00 - 13.00 Central European Time Please reply with "puncher" in your message so I know you read through this message.