Hello Sega.
Could you tell me what program you used to make extracting 1 or 99 spells the same? I like to mess around with the FF VII programs, but I have no idea about the FF VIII ones, however I want to play FF VIII again, but the issue of using magic weakening me pulls me back and I really like your idea, however I'm Spanish and I can't play your mod like I did in FF VII because of the language, so even if I have to play FF VIII I would like to edit the extraction theme, thank you very much.
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.