Just copy Nksp.exe one time, rename the new file to something else like Multi.exe or something.
Then rightclick it, create shortcut.
Rightclick the shortcut, select properties, then at the target u see something like
"x:\path\to\client\Multi.exe"
Just change it into :
Code:
"x:\path\to\client\Multi.exe" -Engine.dll
Now u can run that shortcut as many times u want.
If u open it, your screen goes dim and asks for administrator approval then u can click that link u see on the lower side, then a new window opens and u see a slide.
Just slide it down once, U will still get the message next time but it won't dim your screen anymore and therefore wont hang the client anymore.