My PSP was originally a 1.50 when I bought it then I upgraded to 2.00 then 2.5 then 2.60 then downgraded to 1.50. I herd that the 2.60 downgrader was a unclean install and can cause bricks in ThemePSP. I don't want to use ThemePSP I don't want a modded FW but the unclean FW I might have makes me wonder. So yesterday I saw the PSP 1.50 to 1.00 Downgrader. Tried it it worked perfect but then I couldn't use Devhook 0.46 so I upgraded back to 1.50 with my Coded Arms UMD. Will this make my PSP have a clean FW install now after I upgraded from 1.00 to 1.50 with the official updater? If you want to know my PSP FW history is 1.50 -> 2.00 -> 2.50 -> 2.60 -> 1.50 -> 2.60 -> 1.50 -> 1.00 -> 1.50 -> 1.00 ->1.50