Setting up IPv6 tunnel, having trouble with the GUI part

[Nathaniel Homier]

Ubuntu 10.04.2 GUI version

IPv6 tunnel by Hurricane Electric
Home computer with direct net connection.  No router.  No need to give
out IPv6 LAN addresses.  Strictly end user.

Ok, so here's my problem.  I signed up for a tunnel and used this how to
located here: https://wiki.ubuntu.com/IPv6#Get%20connected%20with%
20Hurricane%20Electric

Editing the interfaces file was easy enough I think.  The interfaces
files ask for IP adresses like so 3501:470:1f04:1a82::1/64 Do I leave in
the slash / and 64 or do I remove them like so 3501:470:1f04:1a82::1
(fake IP addresses by the way)

Second, the how to talks about the GUI part about network manager.  The
how to talks about two separate addresses.  One for the machines IP and
a gateway IP.  In network manager on the IPv6 tab there is no gateway
option, no box for inputting a gateway.  Also as above do I leave in the
slash or remove it.

How did you get your Hurricane Electric tunnel up and running.