Packet Editor Flyff

Hello, I would like to learn how to change the values when i intercepted them : example
when i get penyas from the ground, i get a code in hex
How can i change the values of the penyas im getting for example ?
Thank's

It would be really stupid to have the value of penyas on client and send to server.

Change the value with cheat engine and take a screen so you can show all your friends.