[Coda]

My first reaction would be to just move the keyboard over and use my left hand on the arrow keys. :P I've also been known to put both hands on the arrow keys (left ring finger on left, left middle on up, right middle on down, right ring on right, more comfortable and intuitive than it sounds).

For a few attempts, when my hands were hurting from using the keyboard too much, I tried remapping my Gravis GamePad Pro to have both the D-pad and the face buttons bound to the arrow keys. Not trying to map analog in there helps with the precision issues, and having two sets of inputs helps with quick maneuvers. It took some time getting used to, but it worked pretty well for me once I did.