My Notepad

All applications hosted by a single tomcat container share a single JVM.
To set JVM parameters, simply add following lines in startup.sh script:

export CATALINA_OPTS="-Djava.security.auth.login.config=/usr/local/tomcat4/conf/MyProxyJAAS.conf"

to enable the debug mode, change the bottom line in startup.sh to
exec "$PRGDIR"/"$EXECUTABLE" jpda start "$@"

There are two Axis engine configuration file, one for server side server-config.wsdd and another for client side, client-config.wsdd.
server-config.wsdd will be automatically generated/updated for you when you use AdminClient tool deploy a new web service.
The client side engine configuration file can be specified through JVM parameter, e.g. add following
in your startup.sh to use test-client.wsdd:
export CATALINA_OPTS="-Daxis.ClientConfigFile=/user/local/tomcat/webapps/xxx/WEB-INF/wsdd/test-client.wsdd"

It looks like put client-config.wsdd under your WEB-INF directory wont work without specifying where JVM parameters manually.