You may be able to disconnect the screen ribbon cable from your laptop's motherboard, and see if it will detect that the monitor isn't plugged in there, and switch to the external port automatically (even at boot/bios time). You can probably google around for instructions on replacing the screen for your model of laptop and find some nice illustrated (or even video) instructions on how to get the monitor disconnected.
If that doesn't work, it gets social...
Do you know anyone with the same model of laptop -- that would let you borrow it and use a screw-driver on it?
If so, you could swap your harddrive into their laptop, get a baseline windows install going, then swap the drive back into your laptop and finish setting it up there.