brbackup online_split

I have been tasked with porting a backup using harware array split of a SAP database from Solaris to Linux and I know the theory of how it all works, but very little about the actual config files you have to setup for it to work.

The Linux media server is setup (7.5.06) and the NBU client has been installed on the host and the process as I understand is NBU master kicks off the following:

1. On client DB is quiesed 
2. On Media the storage is split off
3. On client DB is unquiesed
4. On Media, do the backup
5. On media resync the storage

The backup policy on Solaris has Policy Type "SAP" and script in the "backup selections" which looks as though it does all/some of the above

So the script in the "backup selections" sets some environment variables and runs:

 brbackup -u / -c -d util_file -t online_split -m all

So my questions are:

1. Does the above brbackup do all of the 5 steps above or are scripts called before and after brbackup so the brbackup is only doing step 2
2. Somewhere along the line a script called "/usr/local/bin/sap/split.sh" is called (for step 2) which is passed args like diskgroup.  How does brbackup know to call this script with the required args - I assume there is some config file somewhere
3. Likewise, somewhere along the line a script called "/usr/local/bin/sap/resync.sh" is called (step 4) which is passed args like diskgroup - where is this configured.

Mike