My own modem right from day 1?

[#1]

Thanks, if you can't then I have replied to the email as per instructions and maybe a human will respond.  Sigh... I REALLY want to use this silly new router!

[#2]

I didn't have to register when I last read it.
Just tried to register, and it wants the serial number.
Away from home and I'm sure the router web UI doesn't display it.
I tried a few fake ones, but then got a patronising message about them being unable to verify my details and then even more detail on how to read a label.
And all this is to view a website to read a [Censored] FAQ page.
@IngeJones - I did print off a copy so PM me an e-mail address and I'll send you a scanned copy of what I have. It isn't very long and really all you have to do is compare the config displayed in the screenshots.
And there was me thinking I was downloading governement secrets.

[#3]

If it helps, there's a copy of the Draytek guide on here http://www.broadbandbuyer.co.uk/Features/Article.asp?TextID=2095

[#4]

Thanks MisterW.
That's the one.

[#5]

Thanks
My remaining concern now is with firewall stuff.  I need to forward port 80 (which I think I have got set now), but other than that I would expect normal refusal to entertain incoming requests from WAN.  Can I assume the router starts off secured by default or do I have to try and understand its Firewall rules page before I dare put it live?

[#6]

Did it work then?
Not 100%, but yes that's how I understand the firewall thing.
I Remote Desktop into my home server from the outside (mainly whilst at work), so have a custom port open for that (for security I don't use 3389).
Always worth doing a GRC Shields up test to see if ports are closed (as you'd like). Also works in the reverse case so you can check a port forwarding rule is working.

[#7]

Thanks.
I can't test whether it connects yet, as I have to give my users some reasonable notice of downtime to swap round the modems.  They just got over one lot of testing, so I am aiming to try the new settings early one morning in the week   I thought I better find out as much as I can about it beforehand this time!  Currently the Vigor is sitting on our LAN being set up, but not wired to the phone socket.

[#8]

Cool, let me know if you want advice on the port forwarding rule (I'm a poet but didn't know it).
Ended up taking the unit into work, me and the sysadmin plugged it into an old laptop and he helped me with that. 
Edited due to I (still) can't type on an iPhone.

[#9]

I swapped the modem/router over this morning, and it all worked smoothly!  Thank you to everyone who has helped me here