How to change discs in a 2 disc psx game played on PSP???

I have the 3.71 version, I found on internet that with the 3.10 version you can change discs by pressing home (it shows more features than just quit game), but I'm not sure of that because several people are asking the same thing. I believe that most of them should have a more advanced version of 3.10. Please!!!! I've found my dream game and I can't finish it!!!!!