1 Domain Contr on SP4 and another on SP3

I currently have 2 Win2000 domain controllers, both on Service pack 3.
We will be installing a 3rd domain controller. Since it will be in a remote location, I want to install Win2000, put service pack 4 on it, then “forget” about it.
We are not yet ready to move the other DCs to SP4, but we will eventually.
Would anyone expect any problems with this setup?