Just go ahead and send them a resume or CV, it will only cost you postage or fax charges. While the ad I saw said they were looking for 3 years experience, you never know. First of all, they may not get that many applications, and so would have to take one w/ lesser experience.
I've given that job some thought, though it doesn't seem as lucrative as something in the Middle East. You will have to pay taxes to Thailand, where as the jobs I have seen in the Middle East are tax free.