So I bought the mission pack for GTA London 1969 for Playstation and I already owned the original GTA for PS1. The manual tells me to pop in the expansion and it should prompt me to load in the GTA disc (for validation I assume since it does say the original game is required) and it well tell me to replace it. But I've tried it several times now and all it does is load up what looks like the original game, even on the London disc. I have a GTA save file on my memory card too so I doubt that's the problem...
Has anyone else ever experienced this problem? And if so any ideas on how to fix it?