yes i know that firmware launcher can't run umds but mph's gameloader can
and since its the prx files, do the 2.6 fiels have other newer things that sony added since the 2.5 (like new video support or something)
like pspset did for firmware 2.00 but im trying to make it work for 1.5 by putting the prx files etc on firmware 1.5 then doing what pspset did (by making the game think your psp is 3.00 and having 2.00 (or in this case 2.5 files) flash files)