You can use Solaris PC NetLink software or SAMBA
I'm not using either but if I had to I would probably use SAMBA.
check it out at
www.samba.org
What is SMB:
The very short answer is that it is the protocol by which a lot of
PC-related machines share files and printers and other informatiuon
such as lists of available files and printers. Operating systems that
support this natively include Windows NT, OS/2, and Linux and add on
packages that achieve the same thing are available for DOS, Windows,
VMS, Unix of all kinds, MVS, and more. Apple Macs and some Web Browsers
can speak this protocol as well. Alternatives to SMB include
Netware, NFS, Appletalk, Banyan Vines, Decnet etc; many of these have
advantages but none are both public specifications and widely
implemented in desktop machines by default.