The PC shareware version of Quake is available at our SourceForge page (available in .zip and .rar formats):
https://sourceforge.net/project/show...roup_id=158726
It's exactly the same as the version on the id Software site, just in a more accessible archive format. (No install in DOS required first).
Download it, unzip/unrar it, and copy the ID1 folder inside PSP/GAME/Quake on your PSP.
This is in the readme.txt file...
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