How to boot from CD

[warlocklw]

I burned DW into a CD. When I restart my PC, it:

 

1. enter BIOS

2. boot0:done message for a very short while

3. Chameleon EFI pages, where I can choose either boot mac or windows (countdown bar bottom).

 

I heard that mac need to press 'c' when boot. How do I boot the DW cd? I tried to press/hold c everytime for the above 3 steps, but it just normally boot into SL. Any help would be great.