Okay, I see then. Are you sure the item you're trying to edit has 8 "open" slots on it? Because I was having trouble with that too - I had a piece of equipment with only 5 skill slots on it, and some of the mods were not showing up. I ended up using this code:
[Data 1 - Character 1 Equipment 1 Skill Slot Max *Normal Weapon]
0000A68B 000000C6
And everything showed up fine after that.
Some more really good skills I looked up the hex numbers for:
01 44 - When HP is max, damage taken -50% (yellow) <-- probably one of the best defensive skills in the game, because by "max" it doesn't mean 999, it just means above your normal max HP. Like if my character's max HP is 500, if I boost that with food to a max of 750, as long as my HP is above 500, I'll take half damage for everything.
02 F7 - Dealt damage +X% during critical hit (green)
03 1A - Evasion invincibility time +X% (green) <-- anyone try this on every class? I'd be interested to know how well it worked for you.
Finally, I did some messing around in the LoC with the "bonus" elemental skills. It was:
20% of dealt damage added as Lightning and Fire damage (02 96)
________________________ Ice and Lightning damage (03 7D)
________________________ Fire and Ice damage (03 7C)
vs.
Bonus 40% as Lightning damage (00 35)
___________ Ice damage (00 34)
___________ Fire damage (00 33)
The first group out-damaged the second by a fair amount, but the second group hit enemies with status affects a decent amount of times (stun for Lit, freeze for ice, burn for fire). If anyone else would mind trying this as well, that would be cool. Or better yet, try both sets at the same time and see if you hit for amazing amounts of damage.