On the installation day an engineer should install a modem, either a ECI or a HG612. Though he may not as you have a HH5 but I would request you use the supplied modem from Openreach(request the Engineer to install the modem he brought) and the HH5 to handle the PPPoE connection.
If you get a HG612 you can unlock it and use either
bald_eagles program or
Roseway (DSLStats) to monitor your connection.
You can find the Instructions to unlock the HG612
here, it's on the right pane and there might be some more useful Information as well on there.
There is also a new up-to date firmware, which can be found
here.
I don't have much time at the minute but all the ones mentioned in the above topic should have a download link in this topic somewhere,
here. I don't have the time to go through and individual post them at the minute but I will add them If I remember later.
The newer firmware is a lot better than the previous firmware, at least for me and the majority of others I believe.