Hoping someone out there has done this:

My environment: Eclipse 2.1, Windows XP, Clearcase 5.0,
Tomcat 4.1.24, Rational plug-in 2.1.13, Tomcat plug-in 2.1,
JDK 1.4.

I am trying to run a webapp from a directory in a VOB.  Ideally,
multiple webapps in the same Eclipse project, located in different
directories.  I want servlet code to come from the project build
tree so I can modify it without making a WAR and have the changes
immediately picked up by Tomcat.  I've seen this work before.

Problems:

1) I can't add the project to Tomcat's classpath from Window ->
Preferences -> Tomcat, because the Xerces version in the project
causes Tomcat to fail on startup with
java.lang.ClassNotFoundException:
org.apache.catalina.core.StandardServer.

2) I've installed the DevLoader as described in the plug-in
instructions.  No help there.  If I mark the project as a
Tomcat project (in Project -> Properties -> Tomcat), Tomcat fails
to start with the same exception, whether or not I add additional
classes to the DevLoader classpath.  If I don't mark the project
as a Tomcat project, Tomcat doesn't know about the webapp.

3) I tried creating a separate project for each webapp to
isolate the Tomcat settings; no good.  Eclipse says: "invalid
project description: x:/vobs/foo and x:/vobs/foo overlap."
Which is absolutely correct... and utterly useless.  Can
I can have only one Eclipse project per VOB??  (Separate views for
each webapp might make Eclipse happy, but then the webapp views
won't see the classes built in the main project view.)

Suggestions greatly appreciated.

Regards / thanks,
Jonathan