This worked for me when using MabiRaccoon along with PerX Injector

What I did was:
- Open PerX, inject MabiRaccoon.dll automatically
- Open Mabinogi, click start
- After clicking start, open another mabi client right away
- Let the first client load completely
- Open Process Explorer
- Ctrl + F and find "devcat"
- Double click the only result of devcat, close handle
- Find gibberish letters/symbols and close handle that as well
- Click "START" on the second client
- Before second client loads, exit Process Explorer
I used Vista and this method worked great for me. Now I just need to figure out how to open more than 2 clients using this method.