In Norway you can request a permit to operate with higher EIRP. And as far as I know, you have the same option in other countries in Europe. How things work in the US or Asia I don't know - somebody else might have input on this.
With such a permit, you are allowed far higher EIRP in your PTP links and a modest rise in EIRP in PTmP sites.
So yes, we know it's not legal. But perhaps the_time has a permit? And his question was not "is this legal"? His question was "how can this be done".
Anyone up for a hardware challenge?