FS7500 Questions

Just had a new FS7500 installed and am in the process of learning how to use it.  Unfortunately, there isn't much in the way of documentation beyond the installation instructions.  

Here are a few of the questions in no particular order:

The nodes in this device are running firmware version 1.0.1.  According to the EQL support site, there is an update available to version  1.0.425 and a service pack.  However it also says that 1.0.425 only supports PS firmware up to 5.2.4-H1.  The PS4100 backing this FS7500 is running 5.2.5.  So, I’m a bit confused as to whether or not I should install this new FS firmware.

When creating CIFS shares the default permissions to the share appear in Windows as: Everyone – Read and Execute, List, and Read.  Root (Unix User\root) – Full Control.  Root (Unix Group\root) - Read and Execute, List, and Read.  Are those correct?  I’m concerned that the Everyone group is given permissions at all. Plus, who/what are Unix User and Group?  Since the device is integrated into AD, can I not set permissions within the EQL Group Manager application as I would with a common Windows file server?  

I also need to allow non-AD accounts the ability to access CIFS shares.  Within the EQL Group Manager I can create groups and users, but, what are they for?  I do not see any place where I can actually assign permissions to shares with those users and groups.

Trying to not make mistakes in setting up shares and permissions that will be difficult to change later.

Thanks.