I pulled out that TFT from MP4 player ,, the Part number was XY-1.8?? ,, sorry I forgot the full part number ,, I'll check from my TFT stock ..
The most important command register to be identify is RAM Write register,, so try to trace that register , right before the screen clear or image write function,, once identify then you may google the COG
Anyways ,, I have hacked so many TFTs from MP4 players and also the Cellphone TFTs (iPhone , Samsung PDA , N90 Chinces ) including 5 branded TFTs of Nokia Cell phone (6600, 7610 & N70 included ) .. but not yet posted on net ..
I am writing the tutorial and will post somewhere shortly ..