HpUx and ldap Authentication

Hi to all,
i try to configure an HpUx 11.23 to use a Sun Directory Server to authenticate in system.
In my ldap the users is posixAccount.
I read in www that there is a sotware called LDAPUX but it use a profile, and it requires a change that i can't execute in my ldap because it is used also from other system (Solaris, redhat, aix, ecc....) and mainly because i don't have a administration acconunt in this ldap (only proxyAgent access).

There is a method that allows to configure the hpux to authenticate with ldap without HPUX???

Thanks and sorry for my English