Use of ePSXe before 2.0 is highly discouraged. Mednafen/RetroArch is recommended for playing/testing, pSX is recommended for debugging.
how about a weapon formula identical to number 2 except instead ofa 25% chance to cast a spell, make a 100% chance (but a new formula at the end.. not overwriting the 25% one...)
a weapon formula that ignors the normal attack and casts a skill instead at 100% chance?
Vanya, weapons have no bytes for variables. :/