still don't have solution!!!

[rmteo]

I thought so too. Anyway, I tried it and indeed you can get a 2MHz PWM with 3 different (4 if you include 0%) duty cycles with an 8MHz clock. Checked it out in hardware and on an oscope. I can post a picture of the scope but you said you can't see it.

With a 4x PLL, you can get a 8MHz PWM. Of course you can just use CLKO and get these frequencies, albeit without any duty cycle resolution.