How to change Reporting Database inputs in CHub?

Nikunj

During CPS installation i was asked for the following details
Please enter the database type: [oracle, mssql, db2, hsqldb]
Please enter the reporting database host name:
Please enter the reporting database name:
Please enter the database port number:
Please enter the reporting database user name:
Please enter the reporting database user's password:
Just to continue with the installation i entered an invalid Database name and password..Does this affect the entire installation?

Q1::If i want to change the DB details to a correct one do i have to install again or make changes in a single config file?

I also get the following error logged in the /logs/iwserver.log
nfs mount: *server name*:/iwserver/default: access denied
nfs mount:*server name*:/iwserver/default: access denied
WARNING: iwmount: Mount of /iwmnt/default or /.iwmnt/default timed out.

Q2::Is the above error also attributed to the improper database details?

Nikunj

I need this information fast...does ne1 know?or else do i have to complete re-install