Any Network Techs?

So I am in dire need of a quick help from a Network Tech. I have a few EXTREMELY choice sticks to trade for a network tech that can hop into chat and give me a few pointers.

Long & Short:
I just upgraded pretty much every piece of tech in our small office (5 new PCs, 1 New Color Laser Printer, All new monitors, etc.) The kicker is that I also got a new switch for our network which has always worked rather adhoc through a sonic wall firewall that had 5 ports. I got a 16 port Cisco Small Business Unmanaged Switch and now all my IP addresses are all over the board and no device can discover the rest of the network...

HELP!