Using an ISP Static Range for specific devices on my network

First off lets make sure you understand what "static" IP address means. Its a IP address that gets SET ON a device. Like at the router or set ON devices on the LAN side. "Reserved" IP addresses are set ON a router on the LAN side for connected devices. Any device that when connected to the router, gets a "reserved" IP address, set by the user on the router and never changes when a device connects to the router. 

So if your ISP gave you a "Static" IP address, this means that this IP address is assigned to you and the router can only use it and this is used on the WAN side. So under Advanced tab/WAN or Internet setup, you'll see a section that deals with WAN connections from the ISP. Usually Auto DHCP is most common, however if ISP supports the "Static" IP address, then there is a specific option to input this on the routers web page.

For "static" IP address assigned ON devices these addresses are input ON the devices themselves and the addresses needs to not conflict with the routers DHCP IP address pool. So you'll need to adjust the routers IP address pool on the LAN side from 192.168.1.2 to .192.168.1.254 to 1.100 thru .200. Then you'll have room on either side of this pool size for static IP addressed devices. 192.168.1.2 thru .1.99 or .201 thru .254.

Any "Reserved" IP addressed assignments will be with in this DHCP IP address pool size(1.100 thru .200). Not out side.

IP address "reservations" are on ON the routers web page under Advanced Tab/Setup/LAN setup.