Vista Sysprep

Hello all, now i tried to run sysprep for Windows Vista i just install
on the PCs, but i was not success to do it. When run sysprep with this
command "sysprep /oobe /generalize /unattend:unattend.xml" it will auto
delete all drivers installed on vista. The things there are i want to
make 1 image Vista Bussiness installed drivers, default enabled
administrator account (normally when run sysprep it will disabled
administrator account). Anyone can help me to solve this problem.
Thanks very much