Since PSP code are JIT-compiled, usually VNR won't work if the PSP game hasn't started (not only the ISO is inserted, but also when the text has shown).
I mean, if we directly launch PPSSPP in VNR, it won't work.
We have to first insert ISO, start/load the game, until you can see the scenario text on the sceen, and then start VNR at last.
Additionally, everytime we change/restart the PSP ISO, VNR has to be restarted as well (since the JIT code region is changed after the PSP game is reloaded).
I am planning to create a time proc to periodicially query the JIT code region so that it does not matter when we start/reload the game.
But it would take more time to implement...