Can't install the Zend framework

In Drupal 7.x I've uploaded the Zend Framework.

The installer tells me that it installs fine, in fact I can see it it my modules list and I can even enable and configure it.

But when I got to Reports -> Status Report, I have this error message " The Zend Framework was not found."

I've checked and I can see the Zend folder online, in sites/all/modules

Now I'm puzzled. Thinking that maybe it was just a loader and I also need to put in the full Zend framework, I downloaded it from the Zend site and put the latest full Zend framework folder, as well inside my Zend folder. But that doesn't work either.

I checked the ReaMe, and the instructions are just a bit too minimal.

I can't figure out how to " Add it to the PHP include path manually" what include path ? Where?

I've also installed the "Librarier API" but I still get the same error message.

Finally I tried looking for a variable named " zend_path" as in tip #3 of the readMe. I found one in Zend.admin.inc but I'm unsure as to how I should edit it...

I feel like I'm out of options here... Does someone have an idea of what I'm doing wrong?