Password lock the keypad, for k770i

Hi there, I am new in all this flashing and stuff and I find your forum really helpful. I have the k770i phone, which i find quite good, but I would also like it to have a password locked keypad. I tried a Java application which had many bugs and didn't work for me. From what i have read, i found that there is a way to patch a w810 to have a password lock for the keyboard. Could you tell me if this is possible for my k770i? And if yes, please explain how. Thanks!

Now haven't this patch.

look here Äëÿ Sony Ericsson ïàò÷è ýëüôû ìîääèíã ïðîøèâêà

Thanks, but i didn't find anything similar to what i want. Have you got something in mind?