Cheat Engine

[Losplagos]

Ok i figured it out using znes and the attached program.
First you open your rom in zsnes hit cheat then search just like you would with cheat engine.
Once you get down to 1 or 2 codes.
Hit view then click the one you think it is and hit add enter the value you whant.
Then put the par code equivelent into the program game genie converter which you can get here http://www.thegshi.org/?s=downloads .After hitting the snes button put in the par code equivelent into the hex code box.
Then write the game genie code down and try it out in a game genie or using zsnes's cheat feature.

Using this method i managed to make these codes for breath of fire 2

Either first slot or ryu infinite health
EEF0-F376
D7F0-F356

either second slot or katt infinite health
EEF3-F376
D7F3-f356

Note: i have not tried these codes on a actually game genie because it turns out mine whent missing