Several. Msc window from a batch / script call?

I am currently a little hang on.

Unfortunately I do not know better or Google also says nothing about.

I would like via script or batch number. Msc window.
Unfortunately, the batch but after calling the first window and makes it more if I close the window.

Of course, this is stupid. Just wish the thing through all the windows open and then closes.

Has an idea or a white coincidentally just ask the Council?

Thank you !!

Or used du's Call Select to start?

I 've Tried both.
Eg

start "C: \ WINDOWS \ system32 \ defrag.msc"
start "C: \ WINDOWS \ system32 \ defrag2.msc"

It opens only two DOS boxes.

At:

call "C: \ WINDOWS \ system32 \ defrag.msc"
call "C: \ WINDOWS \ system32 \ defrag2.msc"

It makes the same as at:

"C: \ WINDOWS \ system32 \ defrag.msc"
"C: \ WINDOWS \ system32 \ defrag2.msc"

He opens the first and only when I first join until it opens the second.
He should stop simply through both open and close.