If you look on page 7 under section Microsoft SQL Server (2005 and 2008)
Item #2, For PeopleSoft 8.x users only, run the script, UMSSv560ps8x.sql
This script file - UMSSv560ps8x.sql is located in the sub-directory Install folder.
The script file - UMSSv560ps8x.sql is for new Stat 5.6.0 installed (not upgrade).
I believed it should be:
For PeopleSoft 8.x users only, run the script, UMSSv560ps8MN.sql
Documentation error
WORKAROUND:
Waiting for fix in a future release of Stat