1.00->6.37 is all FW.
if u see numbers like 0x0000000 its a code for games like NitePR,MKUltra,DarkFrost,ect..
NitePR,MKUltra,DarkFrost,ect are cheatdevices for GEN,M33,TN and so on. u need to install some stuff to make these work.
ms0:/ is the root of the psp
ef0:/ is the root of the psp Go.
the root is where u see PICTURE,PSP,MUSIC and so on..