CFX-Mesh isn't showing up as an option in the Workbench startpage.
To install CFX-Mesh on UNIX (HP, SUN), you need first to install WB8.1 on these platforms.
You then need to apply the CFX-Mesh add-on, which installs something like a patch.
The downloads for SUN and HP are posted on the customer portal.
Users should be looking for files called CFX81.HPONLY.cd.tar or CFX81.SUNONLY.cd.tar.
There are no passwords needed to use these files, you just need access to the customer portal.
Also on the customer portal is a pdf document explaining how to install these files.
The required license for CFX-Mesh is just the "cad2mesh" license (plus "wbunix" to get the WB GUI started).