This is a Flash game based on Ghostbusters for the NES. You drive the Ectomobile (the 1959 Cadillac Miller-meteor from the movie) through the streets of New York, running over ghosts, and dodging cars.
There are a few issues with the game due to the limitations of the PSP's Flash Player. The game will run pretty slow at normal speed (222mhz), but using Dark Alex's Custom Firmware, you can set the CPU speed in the XMB to 333mhz giving you a nice speed boost. You can pick from three songs from the Ghostbusters Soundtrack and you can turn the siren on and off. If you have both a song and the siren playing, you will not have sound effects. The PSP's flash player can only handle two sounds playing at once . So, you can ether have music and the siren with no sound effects, or you can turn off either the music or the siren and have the sound effects work.
This game is playable on PSP's running Sony's 2.71 and up or using Dark Alex's Custom Firmware. I recommend using DA's FW.
For instructions please read the Read Me (it's there for a reason you know )