Hi,
We've recently deployed Windows 7 64 bits in our school labs using MDT and on our image we've defined stuff in our "Default user" profile to those things are imported to any new accounts that logs on the computers.
We're also using DeepFreeze to ensure that computers will be stable...
active directory
configuration
customization
deepfreeze
deployment
frozen state
labs
logon time
mdt
network sharing
optimization
printer
profile management
software
tech support
tweaks
user account
user profile
windows 7