Don't worry, verbose mate hehe :)
If you have there available a GNU distro then format the usb key (you can use
either winzozz - format in fat32, or on GNU you can use 'gparted') in
terminal:
lsblk
Look at the output- the hard drive should be sda, the usb key should be sdb
or sdc. Say it is sdb for the sake of the explanation
sudo dd if=/home/user/ronmamita/Trisqel.iso of=/dev/sdb bs=4M ; sync
Wait for it to finish.
Then in BIOS select usb as the firs to boot and you should be fine
On Windows you can use Rufus, I used it a couple of times on random computers
around and it worked fine.
