3) The flags that control the barriers and a few other groups of objects are different for v1 and v2. This is because the streaming IPL files are encoded in a different sequence in GTA3.IMG - a really huge archive with most of the game data. These object groups are; the barriers between LS and SF, the barriers to LV, Truth's Crops, much of the pre-Yay Ka-Boom Boom crack factory, and the floor behind the broken wall at Smoke's Crack Palace in East LS.