1.) Download the update file from http://ip2k.com/droid_2-0-1.zip
2.) rename the file “update.zip”
3.) Upload the zip file (do NOT extract it, leave it zipped!) to the root of your MicroSD card (not in any folders, just on the root of the card)
4.) You needed to pull the battery in your Droid to get the card out, so replace the card and open the keyboard.
5.) Hold the “x” key on the Droid’s keyboard and power it on. Continue holding “x” until you see a triangle with an exclamation point.
6.) Release the “x” key. Simultaneous press the “volume up” and “camera shutter” buttons. A menu should pop up.
7.) Using the D-Pad, select to update the system software from the update.zip file.
8.) The update will take a few minutes. During this time, do NOT pull the battery or attempt to turn off the phone. Doing so may corrupt the firmware on your device and render it unbootable.
9.) Once the update is complete, select “Reboot system now”. Enjoy!

This was written based on the original article at http://www.phonearena.com/htmls/Want-to-manually-update-your-Motorola-DROIDs-software-Heres-how.-article-comments-a_8232-p_2.html
md5sum of orig file (and my mirror): 3af35446905040a3123ec09195299596