acl tutorial, problem with command line

I'm following the tutorial on ACLs and I'm stuck here:
http://book.cakephp.org/view/648/Setting-up-permissions

I'm on windows :-( and when I issue this command:
cake acl grant $aroAlias $acoAlias [create|read|update|delete|'*']

I get this error message in return: "read" is not recognized as a
command...

Can you tell me why?

On the same topic, when the tutorial says:

To allow with the AclComponent do the following:

$this->Acl->allow($aroAlias, $acoAlias);

I understand that the file is: cake/libs/controller/components/acl.php

Where exatly this line must be put? how does it differs from the
command line version?

Thank you very much, the more I dwell into cake the more I fall in
love with it..

David
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