PostreSQL on QNX 6.2.0

I installed PostgreSQL 7.2.1 from the third party CD for QNX 6.2.0.

According to these installation instructions:

http://www.postgresql.org/docs/7.2/interactive/installation.html

I have to initialize the database. Do I still have to do this? If so,
where should I put it? If not, where is the database directory?

…Stephen