What OS do you have on there now? That's really where you'll need to start.
If you've got linux, it's as easy as:
As root, open up a console and type:
Find the 0,0,0 of your device, maybe it's 0,1,0 and remember that for the next step, now type:
cdrecord dev=0,0,0 speed=40 -v -eject /path/to/iso/file.iso
Where dev=0,0,0 is the device, speed=40 is the max speed to burn at, and /path/to/iso/file.iso is actually the path to the iso image.
If you are in windoze, you'll need to have burning software capable of burning iso images as images, not as files. To figure out if the burn was successful, you should look at the contents of the CD after the burn. If the contents is a single iso file, then the burn was incorrect and not successful in your needs. However if it's got several files, some folders, and other info, then that would be a "good burn" and things should work right as long as your BIOS is set to boot from CD.