Use smbsh if you don't like smbclient's interface. But smbsh is very buggy though. It took me some times to fix some of the bugs to get it to work on sol 8, 9 & 10.
From your shell prompt, run ./smbsh -W<workgroup> -U<user>
It'll then promt you for your workgroup/NTdomain password,
then it'll...