[Spell Swap] In need of help

[JunkyVirus]

I'm pretty new to all of this, I have downloaded some model swaps and race changes
And I saw a thread about Rogue spell swaps, and they were awesome, but the thread was a few years old so the swap didn't work
So I have tried to make my own swap for about 2 days now, I want to change Stealth for my Rogue to Shadowform and Vanish to Dispersion, both Priest spells, but I think everyone knows that, most anyway

But I can not get it to work, I have tried all the MES's that's on the site, I think anyway, the most popular, And yes I have tried Glitchy's, the race change work perfect, but I can't get the Spell swap to work, when i'm all done and start WoW all I get is an annoying sound and an error message and ofc it doesn't start, I have tried everything I can come up with but nothing works, I've followed most guides here but nothing

So I was wondering if someone has a newer version or way of doing this or just could make the swap for me ?
Ether way much appreciated, and would be so happy for some help Thx