Only way to do it is by swapping. Go to the MC utility and insert a PS1 game and wait till you see the black disc. From there one must slide the tray out without using eject button. Put the copy in and close the tray making sure you slide it back to the left. Once it is done you have to press X and it will boot. I suggest though once you see the black disc on the screen wait a few for the disc to spin down so you don't damage your laser, it only takes a few seconds. There are guides on how to make a card with an old credit card or such. It takes a little while to get used to but it works.
PS3 CECH-25001 Rebug 4.41.2 "Lite" 1tb iNt & 2tb eXT mM 4.40.00
Back online thanks to Primee for the legit PSID!!