1) Workgroups sometimes need to be specified for smbclient
to successfully login. The printtool/smbprint script do not
support workgroupsat all (need to add a workgroup field,
and a workgroup variable translating into -W "$workgroup"
option to smbclient).

2) smbclient usernames can have spaces in them.
printtool just saves
  username=user name with spaces
Should be something like this
  username='user name with spaces'
with proper escapes for any quotes, of course.
But the smbprint script would not process this
correctly, as usrcmd="-U $username" would translate
into smbclient ... -U user name with spaces ... .
Need to redo the script with smarter processing.

Something like this:
if [ "$username" != "" ]; then
   usercmd_opt=-U
else
   usercmd_opt=""
fi

...

smbclient ... $usercmd_opt "$username" ...

and don't forget to add the option for workgroup!

works fine otherwise... thanks