Installing Business Process Manager Advanced - Process Server

I spent most of Saturday today to try install IBM Business Process Manager Advanced: Process Server. I try to follow the document in IBM Knowledge Center in this address:

http://www-01.ibm.com/support/knowledgecenter/SSFTN5_8.5.5/com.ibm.wbpm.imuc.ebpmps.doc/topics/inst_lin_db2.html

However, it is not straight forward. Here are the issues:
1. In the documentation "Creating DB2 Databases" (http://www-01.ibm.com/support/knowledgecenter/SSFTN5_8.5.5/com.ibm.wbpm.imuc.ebpmps.doc/topics/db_typ_nd_lin_db2.html), it says that we can create database using "createDatabase.sql" file located in "BPM_HOME/BPM/dbscripts/DB2/", however since I have not install completely, that folder and file does not exist. I ended up to create the databases manually using this command:

create database @DB_NAME@ automatic storage yes  using codeset UTF-8 territory US pagesize 32768;
connect to @DB_NAME@;
-- A user temporary tablespace is required to support stored procedures in BPM
create user temporary tablespace usrtmpspc1;
grant dbadm on database to user @DB_USER@;
UPDATE DB CFG FOR @DB_NAME@ USING LOGFILSIZ 16384 DEFERRED;
UPDATE DB CFG FOR @DB_NAME@ USING LOGSECOND 64 DEFERRED;
connect reset;

Note: this is only needed because I want to use existing remote database server.

2. Launchpad will automatically install Installation Manager by default if the installation manager has not been installed in the system. However, it will use default location in /var. However, in my system the /var is small and launchpad requires 3GB minimum. I ended up have to install installation manager prior to running ./launchpad.sh. In addition to that even my system is 64 bit, I need to install 32-bit installation manager.

3. The other thing, do not automatically updates with the latest fixes. The reason is the code will automatically update all fixes including the fixes for 32-bit (note: my system is 64-bit).

Once the above obstacles have been resolved, the installation program start running.