Can someone explain theme making?

[/psxclassic]

So, the issue im running into, is trying to figure out the difference between EvoUI and default themes?
What I'd love to do is replace the loading screen with the default playstation black screen with it playing the OG Playstation Boot-up sound. Then I'd like to be able to have a custom FF7 theme show on the main menu with a FF7 medley playing.
Is this possible?

submitted by /u/dmjohn0x
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