I've been warned!!
Thanks for cautioning me. Will check with the dealership. Better yet, will ask them to do it for me. Let me see what they tell me about this.
My car is a 2010 September model and it is covered under the Chevrolet 3 Year promise warranty.
Will check with the dealership tonight.
Thanks again.
*EDIT*
PS: I checked my car's hatch door. Its not linked to the Door Ajar Alert or the Roof Lamp. Only the 4 side doors have the Door Ajar alert/Roof Lamp switches on.
So, we have to get around this particualr limitation if we are to have the light switch on when we open the hatch door(Boot door).