FTP Login on W2k from a Unix Server

I’m trying to set up a Login Name and Password on a W2K Server so I can make a connection from a Unix Server to my W2K box. My Unix software forces me to use a login and password but I can’t figure out where on W2K (IIS) to create this so I can make a connection and download files. Anyone know how and where to create specific incoming ftp logins on W2K server?

Thanks,
Jim