Making an Omarine installation USB stick
After downloading omarine-5.1-dvd.iso, you run the isohybrid command to make it bootable as a hard disk:
isohybrid -u omarine-5.1-dvd.iso
Your USB stick, say /dev/sdb. You run wipefs command to wipe the USB stick, as the root user:
wipefs -a /dev/sdb
Then run this command to copy the image into the USB stick, still as the root user:
dd if=omarine-5.1-dvd.iso of=/dev/sdb bs=4M
Now you have an Omarine installation USB stick.
To install Omarine, you boot from the USB stick. Assume the USB stick is /dev/sdb. You mount the USB stick to /media:
mount /dev/sdb1 /media
You then install Omarine as usual. However, at the step “Select Omarine installation source” you select last item: “Install from a pre-mounted directory”
In the next step, you type /media/omarine64 as source directory
Those are all simple custom steps that need to install Omarine from a USB stick.