using xerces in addition to crimson in webapp

[Torgeir Veimo]

I'm trying to use jdom in a webapp under tomcat-4.0beta. jdom requires a
DOM Level 2 and SAX 2.0 compliant parser, thus I want to use the latest
xerces. 

Option 1: How can I configure so that xerces.jar is before crimson.jar
in the servlet container claspath?

Option 2: How can I make shure that crimson.jar is not before xerces.jar
in the classpath when putting xerces.jar in WEB-INF/lib in my web-app?

Option 3: Is it possible to rip out crimson from catalina, replacing it
with xerces?
-- 
- Torgeir