If you thought filing for Chapter 11 bankruptcy was the final chapter in LightSquared's wireless network saga, you'd be wrong. Hedge-fund manager Philip Falcone is back at the FCC's doorstep with yet another proposal, which he hopes might snatch the maligned network from the jaws of GPS interference-related troubles. Two filings placed with the commission apparently outline plans to use its broadband network in a way that it believes won't interfere with GPS s