set file permission on windows

[Tim Arnold]

hi, I need to set file permissions on some directory trees in windows using 
Python.

When I click on properties for a file and select the 'Security' tab, I see a 
list of known 'Group or user names' with permissions for each entry such as
Full Control, Modify, Read&Execute,  etc.

I need to (for example) periodically set Group Permissions for one group to 
Read, and another Group to None. I need to apply the settings to several 
directory trees recursively.

If this was on Unix, I'd just use os.stat I guess. I don't think that will 
work in this case since all I know is the Group names and the permissions I 
need to allow.

thanks for any pointers,
--Tim Arnold