Win98 : passwd change fail / where is mksmbpasswd.sh ?

[bat-dan at ifrance.com]

  I 'm currently running a SUN SparcStation with
Solaris 2.7 and Samba 2.0.3
  Samba runs as domain master and i got security=user
and i enabled plain text password on PCs but those
Win98 boxes are unable to change their password (
password fail)
  So i want to try with encrypted password but i
can't find mksmbpasswd.sh. 
 Can anyone tell me where to find it ( NOT in source
please, i tried unsucessfuly), or send it to me ?
 Or does anyone know how to change Win98
non-encrypted password from client box ?

Here is my smb.conf
[global]
hosts allow = 192.0.0.
workgroup = WORKGROUP
security = user
domain master = yes
local master = yes
prefered master = yes
os level = 65
wins support = yes
domain logons = yes
logon path = \\ampere\%U\profile
logon drive = z:
logon home = \\ampere\%U
logon script = users.bat
preserve case = yes
short preserve case = yes
case sensitive = no
browseable = yes
invalid users = root
admin users = admin
[netlogon]
path = /opt/samba/netlogon
writeable = yes
browseable = yes
[homes]
writeable = yes
browseable = yes
[tmp]
path = /tmp

  Thanks for your patience !!!