Midgar, I realized that the mod of the thread you suggested makes the game too hard. I mean 5.000.000 HP for Sephiroth is ridiculous, that's 5 times the HP of Mox Ruby.
I though that you wanted a challenge... Tru using the 9999 Limit Break with it. I believe the maximum damage is 30,000 and the stats (hp,mp) can be about 18,000.
Okay, with that 9999limitbreak-mod it could become possible to beat Sephiroth.
However, I would prefer a mod which doesn't make the battles 3 times as hard but rather twice as hard.
Or maybe, I should simply play the normal FF7 trying to finish the game with a low level, e.g. 40, that means without "levelling".
Flatline, thanks for the links.