This information is only stored in the registry.
You can either modify the registry directly (which can be quite challenging depending on what is needed) or you can use the MSLogonACL.exe program to import the permissions based on a file that details them.
Here is a post I made detailing how to modify security via the MSLogonACL.exe program, although it's in the context of working with the local administrator account.viewtopic.php?f=3&t=29915&p=93723#p93723
Here is another post of mine that provides some more information.viewtopic.php?f=11&t=29866&p=93470#p93470
If you want to modify the registry directly, let me know and I'll regurgitate some of my code for you.