Man, I am done... I promise this should do the job... Download the iconset which I have attatched. Its the same icons which you demanded, but I did some 'jobs' on it so that it is supported by IconTweaker. After downloading, unzip the set. Then follow these steps:
1. Click on the 'Icons' option on the left hand side.
2. Select the required icon to be tweaked and then select the 'Change' option to change the icon. You can also select 'Restore' in case of any mishaps.
Thats all!! Enjoy tweaking!!