Windows Server 2008 R2 DHCP out of addresses

I have a class C network 10.1.1.0 that has grown.  I am at the point that I am very low on available DHCP Ip addresses.  We have a lot of routers, switches... and I do not want to change the subnet to a B at this time.  I configured a VLAN and now I have been manually putting devices like printers.. on the new 10.1.5.0 network that I created.

My question;  Now that the 10.1.5.0 network will also function on my network, what do I need to do in the DHCP server to have it give out 10.1.5.0 addresses as well as 10.1.1.0.  Do I need a new scope or multiscope?  Do I just create another DHCP server on the network on a different server?

Thank you