Default Remap camera button

I know that in order to remap the camera button I have to replace \windows\Short_Camera.lnk

The problem is that that file has read-only and system attributes. I tried to change these attribs with Total Commander 2.5beta, but this fails.
Though I made sure my phone is application unlocked by setting the reg key HKLM\Security\Policies\Policies value "00001001" to 1 (was 2).

Does anyone know how to change the file attributes on \windows\Short_Camera.lnk ??

EDIT: I applied the tricks given below and then it worked:
http://forum.xda-developers.com/showthread.php?t=285344