How to display default user registration or User Creation form in Portlet/Jsp ?
You just need to build the render-url that renders the jsp.
Take a look at /portal-web/docroot/html/portlet/login/navigation/create_account.jsp
as to how the URL is created.
You just need to have this method call PortalUtil.getCreateAccountURL(request, themeDisplay)
.
so your JSP code might look something like this:
<a href=<%=PortalUtil.getCreateAccountURL(request, themeDisplay)%>> Create Account </a>
Note: I have not tried this, but it should more or less work.