I have updated to 2.0 and I have a sensitivity problem on my LCD. I need to use the sensitivity adjustment in order to reach out for numbers, space bar ...

On 1.1.4 and previous versions I had this fixed by editing the General.plist and enabling the option for sensitivity adjustment. Now with version 2 not yet jailbroken I can't do that.

I was wondering if it would be possible to have this option enabled by an application developed with the development kit. We need a solution

Seems like your in a dead end my friend until the dev team release the tool. To edit the General.plist file, you need a jailbroken phone and you are aware of that situation. As for your question to have this made with the SDK, the answer is no. The SDK will not allow you to edit any of the system files (or I might be wrong).

Just my 2 cents

Downgrade back to 1.1.4 so you have the option to JB the phone again and wait for 2.0 pwnage tool

Also Please read the link HERE about the title format

Thanks