I WISH I knew the exact commands I used, I would be happy to post them.You have an older firmware from 2012, so some of fodeesha' s instructions may not work based off recent user setup post. @Lone Wolf recently setup a switch with 07.4 series firmware. Maybe he could share the replacement commands he used to get up and running to latest available firmware.
sdyoung, it should like you have the same problem I had! Basically what I did was that I dug through the ? menus until I saw a command that let me set an IP. It sounds like your switch already has an IP (I assume from your DHCP server) so go into the webui and scroll to the bottom and look for TFTP and click on Image. Enter the IP of your TFTP server. Under Image File Name put: ICX64xx/ICX64R08030u.bin. Make sure "Primary" is selected. Then click "Copy from Server". If your TFTP server is set up right it should update to the latest firmware. Once its done (I believe you will see the status in the console), type 'reset' in the console and the switch should reboot. Once its booted you should be able to follow the document exactly as all the commands will work. You can skip updating the primary since it's already been done, but do the uboot. And the poe and basically, everything else! It's a good guide and will get you set up.
Let me know if that helps or not!
Edit: make sure the firewall is off on your TFTP server too.