how to remove the virtual dpad of a game?

how do i remove the virtual dpad(keypad when playing java games)('cause my game is already converted to touchscreen)... it sucks 1/4 of my screen,

my phone: samsung corby gt s3653

advance thank you for your replies ^^

Hey what a co-incidence. Mine is Samsung Corby Pro. About the same.....
To Remove Keypad:
1.Simply open the game you want to remove the keypad from. KEEP IN MIND- Open it in WINRAR and do not extract it anywhere.
2. Find META-INF folder and go in it.
3. Open the manifest file and at the bottom, just add this line:
MIDlet-Touch-Support: True
4.Save the document. Click the close button on the notepad and when it asks "update it in archive?" Click yes.
5. Install it and Ta-dah!! the keypad is gone.
Have fun.

i cant edit the manifest file!!how is that..were using the same phone mine is corby pro also..

I've done this before, and it's always worked, but I just downloaded the Uno touch game for the Samsung Corby and it already had this written at the bottom, but the d-pad still shows up! and i cant play the game properly! any ideas on why this doesnt work for just this game?