This was done in assembly rather than with a tool, which means either using a hex editor on the FF8.EXE or injecting hex script using something like Roses & Wines (which modifies the FF8.EXE at runtime). The issue may be that the spanish FF8.EXE has different offsets to the english FF8.EXE and I don't know what the differences in offsets are I'm afraid.
The hex addresses and the changes needed to be made for the english exe were:
#HP
963CB = B3 64 90 90 90 90 90
#Primary Stats
966E5 = B2 64 90 90 90 90 90
#Secondary Stats
96788 = B2 64 90 90 90 90 90
#Elemental Attack
969D1 = B0 64 90 90 90 90 90
#Elemental Defence
96AAE = B1 64 90 90 90 90 90
#Status Attack
96BC1 = B0 64 90 90 90 90 90
#Status Defence
96C9D = B1 64 90 90 90 90 90
(Credit to JWP for these)
If you're lucky these may be at the same offsets in the spanish exe. Sorry I couldn't be more help. As for what hex editor to use, I personally use something called XVI32 hex editor, but there's likely other free hex editors out there.
Ok, thank you very much, I'll try if it works. The times that I have compared it has been in the Steam version of Final Fantasy VII and the .exe (Spanish and English) usually coincide. Let's see if I'm lucky. I usually use HxD. I don't know if it will be very good, but when I have had to play something from FF VII it has been worth it.
oh! I almost forgot, is this all for the regular Steam version or the remaster? I find it confusing that there are two versions of a game for the same platform...
Ok, I read the post a bit to see if anyone had asked. FF VIII base.