CI_REPORTER- customized report location

Hi All,
I m working on WATIR and using CI_REPORTER to generate test reports. The
reports are generated in the test/reports of my directory that contains
the TestCase class.
However I want the reports to be into a customized location that can be
set by the user. As I m new to RUBY I don’t have an idea about Rake
files and Rake Command Lines, even I m not using Rake files for my
So is there any way to modify the CI_REPORTERS environment variable, if
I m not using rake.
Please Help