A: Licensing hell. The Evangelion IP is split between Khara, Gainax, King Records, and various publishers. The PSP game rights expired in 2014.
A: No. Evangelion: Jo (2009) is standalone. Its sequel, Evangelion: Ha (for PSP), had a separate patch attempt but it was never completed beyond 10% and is not verified. evangelion jo psp english patch verified
Owning the original UMD of Evangelion: Jo is the legal basis for applying the patch in most regions. Do not request or share copyrighted ISOs. The patch itself is a fan work and freely distributed. A: Licensing hell
The verified patch includes these telltale signs on the title screen: A: No
If your patch shows a black screen at the menu or Japanese text only, you have an unverified or outdated version (likely v0.9 from 2016).