DHCP Server 2008

Hello. I am getting ready to change the subnet on one of my LANs from 192.168.101.0/24 to 192.168.112.0/22. Each user has a VOIP phone and each phone's MAC begins with 001036. Is there a way I can force the phones to get an IP Address in a specific range without reserving each individual device?

--TB

Unfortunately the clock has run out and I can no longer experiment on this.

--TB

I am guessing that just using Windows Server, there is no way to assign IP addresses by MAC address prefix.