How to Placing Adsense Website Backlinks?

Placing Adsense Website Backlinks:
>> adsctn.php
- Adsense in content (336x280)
>> adsleft.php
- Adsense at left under the menu (120x600)
>> adslnkctn.php
- Adsense links in content (200x90)
>> adssbbtm.php
- Adsense on New Link (300x250)
>> adsmnutop.php
- Adsense on top menu (728x15)
>> adslnkbottom.php
- Adsense on Bottom (200x90)

Or you can change as you wish.