most webcams would come with an installation disk so all the software required would be on that. even if you bought two then ther relevant software would be bundled with its webcam. You can then start chatting via video link using an application such as Skype (
http://www.skype.com/intl/en-gb/download/skype /windows/) or MSN Messenger (http://download.live.com/?sku=messenger).Finally when choosing a webcam try to get one with an inbuilt microphone if your computer or laptop does not have one. I hope that this helps.