When Symbolic Link is not allowed, that depend on which platform you are working.
If this is a Windows platform with IIS, you can create a virtual directory that is assigned to the master website directory.
If this is Uniix platform, you can only use domain or sub-domain.
Normally, when Symbolic Link is forbidden, use JMS with sub-directory is not possible except on Windows Platform that allow create Vritual Directory.
When using apache, I think it is possible to configure apache with virtual directory when using the alias statement
See
httpd.apache.org/docs/2.0/mod/mod_alias.html