I was also having issues, and had to do the following to get it working: Open the skater.ini (in the skater mod folder) and add "Voicepack=MartyMcFly" to the [SkaterInfo] section, open the voicepack.ini from this mod and find the "GoLines=GoAhDeJaVu" and change it to "IntroAhDeJaVu" (optionally also change GoLines to IntroLines since that seems to be the intent behind the filename), and finally rename the "IntroAh DeJaVu.bik" file to remove the space. you can also remove the mp3s since the game doesn't use them (this might also be required to fix it idk). I'm not sure if every voiceline works but after doing this the voicepack actually loads!