Re: How to get wireless broadband
Did your router come with instructions on how to connect to the router to configure it? You've got to connect to your router via ethernet cable and your computer/laptop. Use an internet browser and type in the address bar the default address of the router ... probably 192.168.1.1 or something similar. After that, follow the instructions on how to enable wireless.
Your wireless card should be fine, 802.11g is backward compatible with 802.11b, which is what your card is.
If you've already done the configurations to enable the wireless ability of the router, then it sounds like you need to configure your laptop to connect. In device manager, does it show that the wireless card is enabled and functioning correctly? No red X in it? Is it set to automatically obtain an ip address? Does your router require a WEP key in order to connect to it? ...
Your problem/question is very general & has lots of variables. Somehow we need to get you to narrow down the things you've done already and get to where the problem lies.