Using an Airport Express correctly as a router in the UK
I am attempting to set my Airport Express up as the primary router in my house. Previously, I've had the Airport Express set up in bridge mode, which I've realised is by far not the best setup for my system. Previously, I ran my internet with a BT Home Hub 4 as the modem/router (ADSL2+) and the Airport Express in bridge mode (which I've gathered is effectively being an access point). On looking through old technological gear for a solution, I found my old modem/router - a Linksys WAG120N. After a quick Google search, it told me that this can work purely as a modem. I was very pleased to find this, and imagined it would be the perfect solution to have my network working as intended:
Linksys WAG120N (Modem) -> Airport Express (Router + Wireless Access Point) -> Network Switch and Other Connected Devices
However, due to the nature of the Airport Express, I appear to be unable to connect properly to my PPPoA ADSL2+ connection. I am looking for any solution with my existing hardware that can complete my plan for my 'perfect' network. I have heard that devices such as the Vigor 120 can do this, but I'd much prefer to not shell out for new hardware if it's possible with what I already have.
Thanks in advance,
Jake Hillion