DOC: to where should we copy the tgz file?
"Copy the SDP to the directory /hxdepots/sdp" - need to be clear what is meant by 'SDP'. On a new install, one downloads the sdp.[platform.version].tgz, copies it to the /hxdepots directory and unpacks it.
Incidentally, placing this tgz file in /hxdepots/sdp/ and unpacking adds an unnecessary layer - /hxdepots/sdp/sdp/...