SBS 2003 and NT 4 domain

I have a mixed network NT 4.0 windows 2000 server windows
98, 95 and also a novell server runnig. I would love to
get rid of my old NT 4 domain controlled but the apps that
run on it are no longer supported

Well the promblem I have is my SBS 2003 dose not have
access to my NT 4 Domain controller The new server is also
a domain controller in a differnt domain on the same
network If Iam on my NT4 server I can see all my shars on
the 2003 server and can access all of them. I tryed
setting up a trust with no luck My question is how can I
see my NT 4 Server and access the shars Do I need to add a
global accont on the server for my 2003 server
Thanks Bill