It is possible to have jsp's served from the document root, with multiple virtual hosts?

We mount jserv to .jsp files, and then set index.jsp as the document index. This leaves jserv to only handle .jsp files (so your /cgi-bin/ isn't handled by it), and Apache will map document roots to the JSP file which jserv can then handle.

In srm.conf: DirectoryIndex index.jsp

In httpd.conf: AddHandler jserv-servlet .jsp