Firmware update caused a boot loop on a RB951G-2HnD so I grabbed netinstall and the firmware, set my NIC to a static 192.168.88.55/24, added the windows firewall exception for netinstall, ran as administrator, it sees the firmware package, the boot requests show up on the card, but no response from netinstall. Did I miss something?

Thanks in advance for any help

Have you disabled all other network interfaces? I'd also disable windows firewall during the netinstall process.

Did you configure static IP on computer interface with 192.168.88.x ? Preferred ip 192.168.88.2 or any free ip different to client address.