1.edit class file in Visual Age (3.0 to 4.0 whatever)
2.export ejb.jar to somewhere,
export all the beans,servlets to another jar file in the identified directory
copy all the jsp,html,js file to the identified directory
4.start websphere server
5.test it from your client end.
in websphere 4.0, you got to Assembly tool, which is quite different from the former edition.
there are several test ways, for me I don't use websphere test envirement.I use the log file to check the error message. It seems slow to know, but this is the real production test.
One more thing, I don't use websphere studio, they add some useless tag inside automaticly.I drow the page by some tools and add the script by myself fast.