I would purchase the intellectual property from IPLY for a couple of millions of dollars (I don't care how overpriced it is, I want that license). Then I would found my own company (Ratty Studios) and start gathering employees. I would get Tim Cain, Chris Taylor, Dave Hendee, Chris Avellone, Josh Sawyer and all the other former BIS employees who worked on Fallout and Torment, no matter how much money they ask. The remainder dough (if there is any left after all those purchases...) would go into financing the project itself. Provided Fallout 3 is successful, we'd also develop a D&D game (only this time it would a turn-based role playing game , not a real-time strategy with stats and equippable items like Baldur's Gate). After that... probably another Planescape game or something completely new and different.
Ah... dreams are always nice, even when they can never come true...