Install PostgreSQL at a later time

Hello,
Sorry, not that easy to make myself understood, english not being my primary language.

Of course I did know I had to reinstall PostgreSQL, I did it right now, but still, that does not answer my question about PostgreSQL appearing magically under Webmin->Servers … reinstalling PostgreSQL did not make that happen, I still don’t have PostgreSQL server module there. Hence my question about an hypothetical “PostgreSQL server module” (I mean a webmin module) to be installed.

Now that you told me about “unused modules” I see that there is a “PostgreSQL server module” but I first had to install a perl module :
The Perl module DBD::Pg is not installed on your system, so Webmin will not be able to reliably access your PostgreSQL database. Click here to install it now.
And even though I did that the “PostgreSQL server module” still stays in “unused modules” and I’m not sure if I have something to do to move it up to “Webmin-Servers”, and sure enough I found it, there is a “refresh modules” button that does that !
Thanks !

Pierre.