How can I install Windows 7 on my MacBook Pro 2006 Late?

[AMDRadeonHD6950]

I saw many videos on YouTube and their videos easily boot Windows 7 install USB with reFit. But I can't boot it and says;

Error: Not Found returned from legacy loader
~
Error: Not Found returned from LocateDevicePath
Error: Load Error while (re)opening our installation volume

The firmware refused to boot from the selected volume. Note that external
hard drives are not well-supported by Apple's firmware for legacy OS booting.

* Hit any key to continue *

And it freezes. I already did the USB's boot partition about MBR and also GPT, but says same.
I used Rufus to make Windows 7 install USB.
Also tried rEFInd, but the symptoms are similar.
My MBP's boot ROM version is latest; MBP22.00A5.B07
How can I install Windows 7?

 

[jav6454]

Are you trying to use Bootcamp or some virtualization software?

 

[AMDRadeonHD6950]

Are you trying to use Bootcamp or some virtualization software?

I already tried to use BootCamp, but there's error.
I reinstalled it, but same thing happens.

 

[jav6454]

I already tried to use BootCamp, but there's error.
I reinstalled it, but same thing happens.

What error does it give you?