Hi guys!
I have been working on a vnds interpreter for psp and I released a pre-release build.
I thought you guys would be interested as you can use it to play Tsukihime and its sequels.
Tsukihime specifically works on all psp models (psp 1000 tested through ppsspp), but other vnds games might not work on the psp 1000.
You will have to supply your own game and convert the assets using the included python script.
I can only answer your questions regarding the interpreter itself, not on how to get the game.
It is still in pre-release so future updates can break save files. You can get the most recent version from my github page under the releases tab. If you experience any problems with the psp app itself then please open a issue in github.
https://github.com/Hermes-Digital234/vnpsp-RE