The MS browser capability component is installed by default and already on your IIS/PWS server. You will need to manually update your browscap.ini, the file it uses for its browser definitions, by downloading a copy from cyScape at http://www.cyscape.com/browscap.
The BrowserHawk component is available from cyScape as a free, fully functional evaluation at: http://www.cyscape.com/products/bhawk/download.asp.