Install LINKSYS to Sony Vaio

Hello, A friend gave me her Sony Vaio laptop. I have AT&T broadband at home and wanted to hook up the wireless with them to take the laptop to my country cabin. I found out however that there is no wireless drive installed in the computer and I was told I had to install a wireless network adapter. I a little naive when it gets too technical. I got from another friend a LINKSYS Wireless-G Broadband Router WRTP54G. Can I use this? I'm sorry if this is a dumb question for some of you.

Thanks for your help:-)

Diane