The wait is over. Finally you can downgrade your PSP 1.5x using this official leacked downgrader. Please don't ask me where i go it from. This downgrader is the same as the one in Hi Res video that was released yesterday. It is fully working on 1.5x PSP but i am not sure if it fully works on 2.0 as it may not be complete (which could be the reason why it is not being released).
Anyway this is the download link : [Link Removed to prevent any damage]
I would like to say sorry to Yoshihiro for letting him down and will feel guilty for not being trustworthy.
Enjoy and remember who released the first working downgrade to the rest of the world.