I'm new to samba myself, and it's been fairly good to me, so I'm not sure if I'll really be able to help you much.
I think the obvious thing would be to try and type in the username and password for the linux box and see if it works.when I try to access it, it asks for a username/pass. *If I click cancel I can see the shares I created on the linux box, but cannot access them.
Well, you can use smbclient to access the windows shares in a sort of ftp-style way (it's console only), or you can mount the smb shares natively with smbmount and smbunmount. This will let you access the shares the same way you normally would access any other directory on your local computerFrom the Linux box, I really dont know how to even try to access the Win2k box. *How do I do that by the way???