The mod updates the soundtrack and character voice lines to match the crossover game.
If you are using a mobile phone, tablet, or PC, skip the PSP mods entirely and emulate the arcade-perfect versions: street fighter x tekken psp iso link
You may find "PSP ISOs" online that claim to be Street Fighter X Tekken. These are typically fan-made mods of other games (like Street Fighter Alpha 3 Max or Tekken 6 ) where character skins have been changed to look like the SFxT roster. These are not the actual game and can often be unreliable or contain malicious software. Alternatives for PSP The mod updates the soundtrack and character voice