If you have access to a later version 6135 or DP135 EPS you can print comprehensive help documentation right at the machine.  From the DocuSP toolbar,  Help, Print  Help Documentation.    Send the file to a hold queue so you can change the plex, it's about 400 pages.  This will  cover setup and configuration of the DocuSP, a combination Administrator's and User's Manual

Install doucmentation is part of the DosuSP distribution, it's available as a pdf on one of the supporting CD's   Installation varies somewhat depending on version, and whether you're installing on a Sparc or X86 platform.