It supports UEFI, but no secure mode? Strange to me, but who knows. Your notebook is from 2008? so it may not support gpt partitioned drives well. What you can try is to set protective master boot record flag on usb drive after dd’ing. On Linux:
parted /dev/sdb disk_set pmbr_boot on
Just make sure to use the usb drive name. It may or may not work for you, as usually it requires for a special protective boot record to actually be present on a disk (with the flag set). If it works, consider to file a bug. Frankly, all that stuff is a bit over my head.
Personally, I’d probably just install vanilla FreeBSD on the laptop, as Trident could be a bit too heavy for it.