[Zope] nested user folder question

[AM]

Hi,
I would like to have nested user folders as shown:

/folder_1
    /user_folder_1_1
    /folder_2
    /folder_3
        /folder_3_1
        /folder_3_2
            /user_folder_3_2_1
    /folder_4
        /user_folder_4_1

Now in a structure like this, what are the rules regarding usernames?? 
Can similar usernames be used in different user folders for e.g. 
username user_1 is in user_folder_1_1 and in user_folder_3_2_1 and have 
different roles??

I tried it and it doesnt allow me to do that, also all roles seem to be 
inherited even though the type of user folders are different (one is 
custom and the other is stock).

However even though I cant create users with similar usernames, the 
users in top level user_folders dont seem to percolate down so that I 
can  assign them specific roles. For e.g. if user_1 exists in 
user_folder_1_1, I cant create it in user_folder_3_2_1 but user_1 doesnt 
appear in user_folder_3_2_1 so I cant seem to assign him any local roles 
there.

How do I get around this??

TIA
AM

-- 
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 Aseem Mohanty							   
 Neurobehavioral Systems Inc, 828 San Pablo Ave, Albany, CA 94706 
 (R) 510 7696011 (M) 510 3014871 (O) 510 5279231		  	
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 "I saw `cout' being shifted "Hello world" times to the left and  
  stopped right there!!"                        -- Steve Gonedes  
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