WPE Pro Receiving Packets

[TheDesire]

Hi there , hopefully it's a right place to ask for help

I've been using the WPE Pro for months already in a browser MMO game and found out some good hacks but I couldn't find a logical way to make 1 trick work

Here is a problem :

In this game we have Vitality to attack stages automatically and gain EXP/Silver and some other rewards (<<Thats the case)
Those "Other Rewards" can be gained by chance , there's some kind of a rate
With WPE Pro I can capture those "Other Reward"'s ID's for example that other rare reward is a Gold , I have the right code but I can't change the received packet that I get form the Server .
"Sending" packet of the WPE pro is to spend 1 Vitality to attack 1 stage , rewards that I get are the packets that I "receive"

So my question is : Can I technically change the packets that I receive from the server ?

Thanks in advance