Never mind. The documentation was in the INSTALL file. Here is the relevant portion:
Automated PostgreSQL Database Setup
Point your browser to http://[yourhost]/path/to/ledgersmb/initiate.pl
You will see an HTTP authentication prompt. Enter credentials for the database
superuser (for example "postgres" user). Then follow the prompts and fill in
If you are trying to set up a database manually, make sure you read the sql/modules/README and sql/modules/LOADORDER before proceeding.