I did the instructions as shown in the thread...
Instructions:
1. You'll need the latest version of odin3 and the USB drivers for Windows. jutley's post on debranding the phone has links to both:
http://forum.xda-developers.com/show....php?t=10648942. Grab the kernel. It is a tar file for odin with the overclocked kernel and a initramfs with proper modules for the kernel:
http://setcpu.com/files/galaxysii_oc_v1.tar3. Reboot the phone into download mode using ADB:
adb reboot download
4. Flash the kernel using odin3 by placing the tar file in the PDA section and pressing "Start."
5. The phone will reboot automatically.
6. Use SuperOneClick to root your phone if you haven't already. ADB should have root access with this kernel so it'll just work.
7. Grab SetCPU and try 1.504GHz.
I did flash the one in the highlighted one... Or is it i allow SetCPU to detect by its own?
Need to flash again?
I'm still on virgin ROM and kernal...i think...

just download and flash latest version of neophatamine kernel. after flash, automatically u can use setcpu..