I am not sure if you are as lazy as I am, but I have really gotten tired of typing all of the command line parameters to test a file using the MLLP adapter.
I finally got off my lazy arse, and created a shortcut.
1. I went into the enviornment properties of My Computer and added the {path}HL7\SDK\Utilities\ to the Path, so I did not have to specify the path to the mllpsend.exe
2. I created a batch file (submit.cmd) that is simply two lines:
mllpsend /SB 11 /EB 28 /CR 13 /twoway /f %1
pause
3. I then went to Tool -> Folder Options -> File Types and found .TXT files and clicked on Advanced
4. Added an item called mllpsend and the application used to perform is “{path}\submit.cmd” “%1″

Now every time I right click a .txt file I have the ability to send it to the MLLP adapter.

Hope that this helps you as much as it does me!