i deleted my message by accident lol.
try his winrar method.sounds like it may work.i was gonna suggest using
Impaler PSX eBoot Creator
itll rip each eboot back to an iso format.you put the discs in order in this app then click create eboot making it combine all the eboots in order into 1,and then take the final result into a game folder name in psp/game
the pops emulator will show a new option once its done this way to switch disc when prompted