Cisco 7960 phone via vpn

Hi,

anyone know how i could connect a cisco 7960 at my house and have it connect to my work via my works windows 2003 vpn? could i maybe install a second network card in my pc to do this? is there some routing trick i could do on my pc or my router? 3rd party router firmware? my home router is a linksys wrt54g.

any ideas would be appreciated!