[Zope] Create a list in the REQUEST space ????

[Daniel G. Rusch]

Help!,

We are trying to load user roles from a table. roles needs to be a list
so that the manage_users call can set the roles. 

The question is how does one create a list on the fly in the REQUEST
Space...? The below snippet does not create the list, any thoughts???

//snippet
<dtml-in getUserRoles>
	<dtml-call "REQUEST.set('roles:list',name)">
</dtml-in>
<dtml-call "acl_users.manage_users(submit='Add', REQUEST=REQUEST)">

Thanks,

DR