Well, good news, at least you have the MCP-T southbridge (with nForce Audio Processing Unit). Now the bad news, there's no header for connecting a breakout cable.
OK, first thing I'd like to say is that Gameport to USB adaptors that come packaged with certain other controllers won't work, because those controllers were designed for compatability with that special adapter, not yours.
So that leaves some REAL HARDWARE adapters. I've actually SEEN gameport adapters. I believe those I saw had gameport/serial/parallel ports. Those combination devices are kind of pricey, but let you put several ports on one USB connection.
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