Hi Guys
I know you answered my original question and got my dual boot menu working but I'm still interested in finding out why I can't mount the other partition in Thunar. If I run Thunar root in terminal this is the window I get the following screenshot and error messages in terminal as below:

[brianrh@localhost ~]$ su
Password:
[root@localhost brianrh]# thunar
/usr/share/themes/Phoenix 2011/gtk-2.0/gtkrc:59: Clearlooks configuration option "sunkenmenu" is not supported and will be ignored.
/usr/share/themes/Phoenix 2011/gtk-2.0/gtkrc:60: Clearlooks configuration option "menuitemstyle" is not supported and will be ignored.
/usr/share/themes/Phoenix 2011/gtk-2.0/gtkrc:61: Clearlooks configuration option "listviewitemstyle" is not supported and will be ignored.
/usr/share/themes/Phoenix 2011/gtk-2.0/gtkrc:62: Clearlooks configuration option "progressbarstyle" is not supported and will be ignored.
GVFS-RemoteVolumeMonitor-WARNING **: cannot connect to the session bus: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
GVFS-RemoteVolumeMonitor-WARNING **: cannot connect to the session bus: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
GVFS-RemoteVolumeMonitor-WARNING **: cannot connect to the session bus: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Does this suggest a particular problem with my setup or is Thunar not capable of doing this?
Thanks.
Brian