HP G70-250US Notebook - How To Change Network Name (SSID) And Password

I have an established wireless network, using a wired Dell desktop (XP), wireless HP G70-250US notebook (Vista), wireless HP Officejet 650 E709n printer, and Belkin N600 router. To make a long story shorter, both my cable company and Belkin were involved to set up the router a few months ago, and I was assigned an SSID and password that I now want to change. I've received emails from Belkin on changing it at the router - but when it comes to my notebook computer, how to establish a network - I'd like to know how to change the SSID and password in an already-established network, once I've made changes with the router. I'm assuming this is possible? It is my understanding that I don't need to make any changes with my wired desktop, other than to use it when making the router changes? I'm a little familiar with the network configuration setting process with my printer, so am pretty sure I can handle that.