[The Radium King]

precision chassisworks just put an electri cps pump into a boxster (check out the kpaz subaru conversion thread).

here's a link to how to convert to manual ps:

http://forums.rennlist.com/rennforums/928-forum/663439-manual-steering-rack-2.html

and this helps a lot:

http://auto.howstuffworks.com/steering.htm