Join shareaza (ensure you have an antivirus and firewall though!). this is a file sharing portale much like Kazza. Shareaza uses both edonkey2000 and Gnutella networks.
Just follow the instructions once u have downloaded the browser and stick the large file into your shared folder. Leave your PC on and connected overnight and it will be shared onto other users shared files etc and populate the network. Once its on many peoples PC's it will donwload faster due to better distribution!!