The registry will work for the first user, but after a new user logs in, the GP will change these settings for the new user.
To perform a gp deployment, do the following: Install one GP of the machine the way you want it. Once you're done, go to C: \ windows \ System32 \ GroupPolicy and copy the contents. (note: this is a hidden file). On the following machines you want, just paste back into the file.
If you do this in a package, you will need to run the package as an administrator in order to touch the C: \ windows \ system32 folder. (UAC, Bane IT)
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