how can i make weblogic ant tasks not override my changes

I use jwsc Ant task to generate web services deployable component using a jws class. However, I make some custom changes in web.xml, weblogic.xml and place a servlet in web services war. All these get overridden when I run jwsc task to regenerate my webservices component. What's the best way of handling this situation. I'm begining to believe that maybe using weblogic ant tasks to generate webservices is good for helloworld programs but not for the real world projects. Can somebody share some real world project experience of developing webservices using weblogic tools.

Thanks,
Tauqueer.

Have you tried looking at the ant attribute "overwrite"?