I think Banquo's Ghost sums up the situation quite well.

Installing a Western style democracy would probably involve eliminating the Taliban; "neutralizing" the present warlords...and their clique...to the 3rd generation; imposing the "rule of law" through martial law (at least initially); finally getting the remaining ppl to agree that all of the above was a swell idea and for their good really...

Of course the above prescription ignores any thought of the legitimacy of the regime in the eyes of the ppl it was imposed upon. We can work that out over time...(return to beginning of process)