Hi there and welcome... 
  
If you dont want use your original DVD you have to create a bootstick. Leon correct me if im wrong - the only way you get this is cloning the dvd in a working OSX onto your usb stick (easy - format Pen Drive "Mac OS Journaled with GUID" - restore DVD to USB Pen - thats all). 
  
After that: boot from the Bootdisk - Bronx told you - and choose the Pen drive for installing OSX. When finished boot with the Bootdisk into your installed OSX and install Chameleon and the latest EDP (from Wiki) for your Notebook.  
  
DONT RESTART - INSTALL ALL COMBO/UPDATES FIRST.... 
  
If you have installed all Updates and you are sure you are at Version 10.6.7 its time to restart. 
  
Now it boots without Bootstick into OSX - this is basically all - next step is doing all the cosmetic stuff (BIOS, GMA Booster, Sleep, ...) - but please read at your own in our wiki  and/or our forum... 
  
Hope it helps 
  
Cheers