You must own a copy of GTA III on PC (Retail or Steam). You need to copy the game's installation folder (containing files like txd.img , gta3.dir , etc.) to your Vita's memory card.
💡 Tip: For an even smoother frame rate and shorter load times, consider using an overclocking plugin to safely boost your PS Vita CPU clock speed. gta 3 vpk ps vita work
: Copy the files from your GTA 3 PC installation into ux0:data/gta3/ . You must own a copy of GTA III on PC (Retail or Steam)
: Use a USB connection via VitaShell rather than FTP. FTP is notorious for corrupting large game files during transfer to the Vita. Optimization & Performance : Copy the files from your GTA 3
The VPK version usually only includes SFX. To get music, you need to convert the PC .raw radio files to .mp3 or .ogg and place them in ux0:data/gta3/audio . Many pre-configured asset packs exist on the /r/Vitahacks subreddit.