I know that if I want to network two computers, I need a broadband router(I'm hoping to get wireless) and a wireless PC card (do I)? I have a main computer that I use with W2K NT Professional and one with Windows 98. I want to transfer several large files on that Windows 98 machine to the W2K one. Would two different operating system matters? Additionally, if one wireless router is needed, do I still need to buy two wireless PC Card for both of my computers?