Electric power steering anyone?

I've recently bought an electric powersteeringpump from a Toyota MR2. It's about the size of the stock starter.
You can just about mount this thing anywhere you want under the hood like in a fender or below the battery-tray.

The only challenging part is how to 'intelligently' control the steeringpump, as for instance, you don't want/need full pumppower when the car is idling or going straight down the road. So to save pumplife it would need to be throttled down to a lower rpm.