Analytics Software

Hi,
I am looking for documentation which describes how I can use the command line options provided by Discoverer to generate reports automatically.
At present I have following very specific needs -
1) How do I hide username and password
2) How do I separate the each report and its parameters into different files instead of having all commands in one file
3) How do I trap errors if any

I did find documentation titled "Oracle Business Intelligence Discoverer EUL Command Line for Java User's Guide". However reading the introduction led me to believe that this was for managing the EUL only and not for generating reports.
I would appreciate it if someone can provide me with a link to any documentation that is available on how to generate Discoverer reports in a batch.

Any help would be appreciated.

Regards

Manav