Try this.
1. Open the CPS for said item (eg. Swordman White dragon vest) using RanTool > CPS Editor
2. Open the CPS for any vest item (Dark Lunar swordman vest) using RanTool > CPS Editor
P/S : Open two RanTool to make it easier for you to compare both CPS.
3. You will see on Dark Lunar swordman vest there is an effect called DxChaLevel if I'm not mistaken.
4. Double click the DxChaLevel to see the setting.
5. Try to add the setting into the Swordman White dragon vest CPS. Just follow it. But make sure you used the correct texture for it or else it will not look good.
6. Try it out, don't forgot to copy it into skinobject.rcc
Good Luck.
-devsixx