DHCP and procurve 2524 switches

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Hi everyone,

I have a W2k3 DC which services about 240 clients so I'm running out
of DHCP leases.

There are approximately 10 procurve 2524 switches in the building
servicing 5 floors.

What is the best way to migrate from the existing DHCP scope to the
new 10.x.y.z scopes that offer more subnets/hosts.

Thanks.
.