Best configuration for Raspbbery Pi 3 ? ( Retropie )

[M4RVEL]

Hello all. This is my first message here and if I put it in the wrong place then in that case I am very sorry.

For a long time I have a problem with Retropie configuration. I try to set the emulator from PSP and DREAMCAST so that the games run smoothly but almost all are jammed. I also saw people who emulate GAMECUBE and would like to ask how it looks in practice? I'm trying to set the best configuration for all emulators, but the only problem is PSP and Dreamcast emulation. I have tried such games as Tekken Dark Ressurection (PSP), Silent Hill Sharted Memories (PSP), and also Resident Evil Code Veronica (DC) that are most important to me. My English is not the best, so please understand me. I'm from Poland and unfortunately I can not count on help on Polish forums, so I ask for help with the best and most optimal settings for proper emulation of PSP and DREAMCAST. I also heard from people that GAMECUBE emulation is possible and would like to ask if it is worth installing? I do not know much about using RETROPIE so please help explain how to best configure emulation of PSP and DREAMCAST as well as other emulators. I would be very grateful if someone could also send me a copy of the RETROPIE files with the best emulator configurator without games so I did not have to bother with configurations and settings. I also saw videos on Youtube where people have very nice looks of NES and SNES games with descriptions and animations and I would very much like to be able to set the look of the games list on NES, SNES and also other emulators. Example down bellow.

[IMG]https://images84.fotosik.pl/639/7f1c6c6d58c99a2fmed.png[/IMG]

I think many of you squeezed as much as possible from Rospberry Pi 3 so please help those who know about it.

Thank you very much and best regards.
M4RVEL