There is no AD command that can manage the "user cannot change password" flag, the only way to access this flag is to use the SamAccount command Account.Edit, which is very easy if you already have SamAccountNames in one of the data columns. If you do not have the SamAccountNames you will have to use the ADValue function to translate from common name to SamAccountName.
[Settings_Begin]
BatchSettings.Delimiter=TAB
BatchSettings.MarkerCol=4
Account.Password.CannotChange=Yes
SET ADDomainPath=dc=com/dc=acme/dc=D31
SET ADOUPath=%ADDomainPath%/ou=MyOU
[Settings_End]
[Machines_Begin]
\\main04
[Machines_End]
[Batch_Begin]
Data.Loop SET col0=ADValue (ADPath,%ADOUPath%/cn=%col1%,samAccountName)
// Variable "col0" now contains samAccountName
// (name "col0" chosen to "fool" syntax checker)
Account.Edit %col0%
Data.Endloop
[Batch_End]