NetWare 5.1 SP3

I want to install SP3 on one of our NW5.1 servers. All the servers in our tree are currently 5.1 with SP2 installed. I think I’m right but I just want to confirm, is it best to install SP3 on the server holding the master replica of the root partition FIRST ?

Any other pre-requisites that I need to be aware of before installing SP3?

B4 you ask – I’m not installing SP4 because it has not yet been tested within the company.

Thanks.