In this tread I'll try to explane how to make party only with yourself.
You will need two PCs or someone in game with WPE too to help you...
First you start your ROSE and WPE and pick in proccess menu "TRose.exe",
then do same things on another PC with different account...
Don't forget to coose in both WPEs capture only send packets...
On your second PC press in WPE "Start loggin" button, then in game send to your first char party request...
Now press in WPE stop button, you will see a packet window with something like: "xx xx xx 66 65 47 yy yy yy 00 00", were "yy yy yy" - your other char...
Now on your first PC press "Start loggin" button in WPE, then in game accept your second char's party request...
In WPE press stop and you see in packet window something like this:
"0B 00 B0 66 65 47 xx xx xx 00 00". Now in last packet you need to replace "xx xx xx" with "yy yy yy" and send this packet...
Ofcourse you should leeve your curent party first...
One more thing: you'll have to do all theese things every time you want to party with yourself...
P.S. Sorry my bad english...