Um...need a clarify things a bit here. Since Linux normally would refer to the kernel and that would normally be 2.6.x I'm not following you on the linux ver4...there's no such thing.
What you should have is a distrobution/flavor of linux..like Ubuntu,Fedora,Suse,Slax,Gentoo...etc. etc.
Automounting is handled by different way...sometimes by the desktop environment ...something line Gnome,KDE,XFCE,Enlightenment. etc.
I use Gnome and automounting is handled via the gnome-volume-manager which is controlled from gconf-editor.
There are other ways depending on what your actually running.