A question probably nobody will answer

Outside of contacting the ISP themselves, is it possible to change one's IP if their provider only offers a static IP? If so, how?

I believe I have a reliable source of SOCKS proxies, and I don't expect the game I intend to use them for to have much in the way of checking for proxies; the main problem is that I'm dreafully inexperienced at this and have no idea how to route my connection through the proxy without a built-in feature inside the application.