To read the comics on your psp put one of these comic viewers in the 'GAME' folder for the psp slim and 'GAME150' for the phat psp (if im wrong read the 'readme'). Make a 'comic' folder in the root of your memory stick and place your comics in there, .cbr/.cbz files for pspcomic and .pdf/.jpeg files for pepviewer.
Go to the link given when you click the 'Digital Comics' icon on PSP.
interenet.
Read good comics at - http://www.thetopwebcomics.com/
first you need ofw 6.20 or higher then you have to enable it trough the psp's wifi, then download comics on the PS store, their are some for free. but none are really good.
spider man 3
You can read the manga and comics at Zelda Legends, which is linked below.
most Japanese's comics are read back to front. its weird but it's normal to them
PSP-1000, PSP-2000, PSP-3000.
Grand Database Comics...
no where
Flashing a PSP is basically hacking it to read programs it normally wouldn't read.
You can read them on the official Marvel Comics website by paying a fee.