Just a note folks, I treat myself to a new Netgear WNR2000 N Router today (would've loved the MaxRange N router but couldn't afford it), which means the network will be unavailable later tonight, to allow for the current routers being replaced.
I'm planning on doing the replacement at approx midnight tonight (GMT), and it shouldn't take more than 15 mins or so (allows for disconnection, connection, config, testing and backup).
/edit 01:06 28-12-2009
I've had to ditch the router replacement idea folks. The new one doesn't have a modem built into it (could've bleedin told me on the box!)