If you watch the teaser from 2008 with Son and Peung (starts at 3:43):
http://www.youtube.com/watch?v=DHsdDxgcPTg&list=PL2ECFF1D48911C7F9
...it does look like a remake of Poh and Kob's lakorn.
Here's a summary of that lakorn (Katakorn Kammathep):
Thee (Son) is a rich boy with a concerning father who asks him to study abroad as a test to see if his true love for his girlfriend will prevail. But Thee's girlfriend, Panin (Pei), betrays him and marries his millionaire father for the sake of her gambling-addicted father's failing business.
(I think Pei was originally casted as Panin because of the clip at 4:29.)
Things get nastier as Thee's loving dad dies mysteriously and leaves all of the estate to Panin. Panin's father (Pol) asks Thee to visit his factory in Mae Hong to see if Thee will be interested in purchasing. Thee meets a resort manager who carelessly puts him in a wrecked helicopter. Thee's pilot is told to let the helicopter fall down a cliff. Thee amazingly survives the crash and discovers that the crash was not an accident.
Thee then meets Oon (Peung) after surviving the crash (at 4:06). She is the resort manager's step-sister (her mother married his father). Thee tells her that he has lost his memory just to avoid harm from her step-brother, Ruk (I believe it's Puri from the teaser). Ruk is ordered to kill Thee (at 4:16), for his father is a friend to Panin's father. Thee jumps in front of their speeding car, so Oon names him Chok (lucky/unlucky, depending on the suffix) since they do not run him over.
Ruk loves Oon, but she sees him as a good brother (at 4:31). Oon plans a trip with her college friends, but only one comes--Vipach--so Ruk comes along as a guide. Thee tells Vipach about the whole ordeal and decides to stay and work at the resort to find out about the murder plot and gather more evidence. During all of this, he falls in love with Oon.
Thee also discovers that Panin's father made a fake will saying that all of the estate would go to Panin. Panin then finds out that Thee is in fact, not dead and wishes to reconcile with him. She comes to the resort but finds that Thee has lost all of his interest in her. Therefore, she helps Ruk's father to set a plot to rape Oon, but the plot fails.
Ruk and his father are killed by one of his employees, for his father is a womanizer.
In the end, Thee gets rid of Panin and marries Oon.