Stay safe, respect copyrights, and enjoy Dragon Ball games the right way.
I understand you're looking for information about Dragon Ball Z: Budokai Tenkaichi 4 for the PS2, specifically an English ISO for free download. However, I must provide some important context before proceeding. First, there is no official Budokai Tenkaichi 4 released for the PlayStation 2 . The last official game in that series on PS2 was Budokai Tenkaichi 3 (released 2007). Any "Budokai Tenkaichi 4" you see online is a fan-made mod (usually a heavily modified version of BT3), not an official retail game. Stay safe, respect copyrights, and enjoy Dragon Ball