it seems that the more advanced users are afk for the moment, and i am interested in what others at that particular forum are saying
Ok wow... Let me clear this up for you. A few people at best have actually been successful at injecting edited Pokemon into the game and no-one has made their methods public. We haven't gotten to the stage of being able to inject Pokemon reliably yet. Again, no-one who has / or claims to have injected edited Pokemon has released the method they used.
The "injection" of the original comment you asked about was referring to was simply reading a packet to have a look at the PKX data and then sending it back on its way - no editing involved. Just be patient on the whole injected edited Pokemon thing.
At some point some method is going to be made public. Until then there's very simple guidelines as to how you can extract PKX data from Wonder Trades all over this thread.