There are several files where you can change the behavior or the look of regain.

Crawler configuration:

• The log4j.properties contains all settings for the logging. You can define the granularity, the format and the location of your log files. See the log4j documentation for details.
• The CrawlerConfiguration.xml contains all settings for the crawler.

Search mask configuration:

• The web.xml defines where the main search configuration file SearchConfiguration.xml is located. By default the config is searched in ../conf/regain/SearchConfiguration.xml. That is if your tomcat directory is c:\Programme\jakarta-tomcat you have to put your SearchConfiguration.xml to c:\Programme\jakarta-tomcat\conf\regain. If you want to use another config location, you have to edit your web.xml and change the searchConfigFile init parameter.
  See How to find the error cause if you keep getting error messages.
• The SearchConfiguration.xml contains the actual configuration for the search mask.
• To configure logging (and avoiding an error message at startup) configure a log4j.properties file in webapps/regain.