Disguised Monster skills

[Vixus 0]

Hello Good day hercules.. can you help me with something.. like how to make a player disguised that is triggered by an NPC

ex. prontera,155,155,5 script disguise 811,{

disguise: Poring

set baseatk 10

set skill poring skill

set players skill: off

so when a player disguised as a poring.. he or she can use poring skill.. and cant use other skill

in example.. a wizard disguised as poring..

the wizard cant use all of his or her skills

except for the poring skill

thanks