I'm going to tell you what we did just because I went through this with our department when I came one. What we did for our network is we excluded the address from the DHCP Scope, because it was easier for us to carve out a subnet for our servers and printers or even start you scope on a higher number. I don't know your subnet setup now so I'm just telling you from our experience. My question is for you is to give us a brief overview of how you have things now. Please use fake addresses, because we don't need to know everything.
This is how we setup new schools in our district:
10.x.1.1 - 50 Are for your Servers
10.x.2.1 - 50 For Network Printers
10.x.3.1 - 8.254 Client Computers This is where our scope starts and ends.
The other reason we did this is for migrating to new servers the tools that Microsoft gives you doesn't export the reservations. So they would have had to be put back by hand and with over 700 Servers and 2000 Printers I wasn't going to do it.
LZ-KID
The fluffy midgets in my head tell me to format everything and hope the end user knows how to backup their data.