PSP picture viewer listing order

I'm having sort of a problem here and i'm hoping someone could help out. I'm trying to place Tenjou Tenge Mange into my psp photo file. Obviously, each volume has quite a bit of pictures in them. On my computer, the pictures are ordered by name so it goes in ascending order by number. But when I view them through my psp the order of the pictures come out to the date each picture was modified/created so the pictures are no longer in order and shuffled quite a bit. Now to avoid useless answers, I say again when I view them through the psp and not on my computer; thatany folder via psp folder or orginal locationthat is viewed on my computer screen list the pictures by name. But once I disconnect the psp from my computer and try to view it through the psp, the pictures are now listed my date modified/created. This i'm not to sure how to tell my psp through the psp and not through the computer to list them by name. Thanks for the help.

there are programs designed specifically for comics and manga that will modify the pics so that they will order correctly.

I cant remember the program name, but check out pspupdates.com in the download section.