The OP says: "Frankly one days income for me here in Austalia is equivalent to the entire value." Given that, there is no reason whatsoever to get involved or do anything as the probate costs will exceed that figure (unless you make more than a couple thousand dollars in a day).
As to the OP saying he wants "so and so" to get this or that, it's not up to him. The deceased had a Will and, as long as it's valid, the Will will dictate who gets what. And the suggestion by another poster that Wills are often held by courts to be invalid due to duress or mental incapacity is baloney (yes, it does happen on rare occasion when there is reasonable evidence to support such a claim); however, even if the Will was held to be invalid, the assets will go to the persons designated by Thai intestacy laws and not to any others.