J56003 is a "container" hot fix that contains "member" hot fixes which will update your SAS software components.
See "What is a container hot fix?" in the SAS Hot Fix FAQ for more information on container and member hot fixes.
A manifest listing the contents of each of the following "member" hot fixes is available:
J57003 manifest for SAS Forecast Analyst Workbench Mid-Tier 5.1_M1
J58002 manifest for SAS Forecast Analyst Workbench Server 5.1_M1