the poster mentioned "DHCP Address Router: 192.168.1.100 - 192.168.1.200"
i would understand that as the range of addresses that the router will use for DHCP addresses, you will still have between .2 to .99 and .201 to .254 addresses that can access the network and communicate with each other.
Correct. This is simply the range that can be used by the DHCP service on the router.
also that you should ALWAYS use address outside the DHCP range when using static address for some items on your network to prevent IP conflicts.
Correct again. Due to differences in the sematic interpretation of "static IP address", some products/vendors will specifically require a listed static IPs to be within the DHCP service range, where others will specifically require them to be outside it. Hopefully your router (or DHCP server) will warn you if you try to do the "wrong" thing.