Peekstar... 
  
the cursor still hadn't come up when i plug a USB mouse (also tried pressing the esc button, cmd+tab, and any keyboard combination i know) 
  
no additional kext is added... just following Jake Lo's guide, including his e6430HD4000.zip to my exttra in my USB install key --> could be the reason, as when the first instalation process is started, i still can see the mouse, only after the first restart (after the failed notification), the mouse cursor is missing, sometimes it's there as a garbled pixel 
  
Could you please post your extra folder an any other SSDT or DSDT files? 
currently im installing a fresh ML 10.8 and did not plan any update to 10.8.5 however... 
but if your kexts are meant for those update, i will... 
  
thanks  
  
Edit: 
My bad... it seems that my BIOS is the one causing trouble... Jake Lo has pointed this, but i missed it... Now after downgrading my bios back to A09, i can see my cursor... yeay!!! 
  
Peekstar, 
Could you please advice what other kext is needed? 
Thanks