CalmStorm, I have the same issue: After installing Trisquel on libreboot and
trying to boot I get stopped by the "error: file `/vmlinuz' not found"
message.
And I've found no way of solving it yet.
I have an 'appointment' with Leah Rowe, that she will guide me to a solution
via #libreboot some day. I already discussed this with her and together we
found, that I apparently have no /boot/ and no vmlinuz files, which she finds
"strange".
By email Leah suggested me to "add a symlink in your / to make that file, or
you can modify your grub like so:
https://libreboot.org/docs/gnulinux/grub_cbfs.html"
And to this in this way:
"Boot trisquel live usb and mount the installed partition then go into
/boot/grub on that partition in your terminal and do:
ln -s grub.cfg libreboot_grub.cfg
reboot and it should work"
If you manage to solve this, please let me know.