From: golden67

Perhaps I asked the question wrong. What I am looking for is software
that I can use in the studio that will enable me to get instant
feedback while I am shooting with my camera hooked up to my PC.

Yeah, I got that ... check the "EOS-1Ds Software Instructions" Manual that
shipped with your 1Ds, specifically Ch 5 "Operating the Camera from Your
Computer" describing how to use the RemoteCapture software that came on the
disk. It's all there ... I haven't tried it with mine but it sounds like it's
simple enough.

Bill