Eircom netopia wireless router hack

I always had concerns about Eircom’s default set up for their wireless broadband routers ever since one of my clients asked me to set one up for them. When you get a wireless router from Eircom, you are also given a disc which has a program on it to help you generate your WEP key. With the program loaded on your computer, you simply enter the serial key on the side of the router and bang, you have the WEP key - to write down and take away.