damir: well, it depends on the goals. If you want to connect some NT boxes with a single AIX, samba is better, as it is native on NT. Though if you plan to connect a bunch of AIX boxes with a single NT box, whatever NFS client might work well for you, as NFS service is ready-to-run on a just-out-of-the-box AIX installation. You might take a tour about "smitty nfs"
--Trifo