I wrote a small script that can modify the softkeys. To use it you have to install
nScriptM.
Launch the script, select the softkey that you want to clear (then click on clear)or modify (then click change). To validate the change click OK otherwise to cancel the change click Cancel.
Don't forget to backup your machine before use, who knows what could happen
I did this script for my x51v. You can download it
here.
User : host and password : host