Help, Only Free Software

Open a saved console in author mode by doing one of the following:

Right-click the .msc file, and then click Author.
Click Start, click Run, type mmc path\filename.msc/a, and then click OK.

In the console tree, click an item associated with the taskpad view. On the Action menu, click Edit Taskpad View.

To add an item to a new MMC console for a local computer

Open MMC (disk defragmenter).
On the File menu, click Add/Remove Snap-in, and then click Add.
Under Snap-in, double-click the item you want to add, and, if prompted, do one of the following:
Click Local computer: (the computer this console is running on), and then click Finish.
If [...]

MMC Command Line OptionsOpens MMC. Using MMC command-line options, you can open a specific MMC console, open MMC in author mode, or specify that the 32-bit or 64-bit version of MMC is opened.
This is very useful On Disk Defragmenter
Syntax
mmc path\filename.msc [/a] [/64] [/32]
Parameters

path\filename.msc
Starts MMC and opens a saved console. You need [...]

Microsoft Management Console (MMC) hosts administrative tools that you can use
to administer networks, computers, services, and other system components.
Microsoft Management Console
To open MMC

Do one of the following:

Click Start, click Run, type mmc, and then click OK.
At the command prompt, type mmc, and then press ENTER.

The complete command-line syntax for MMC is: mmc path\filename.msc [...]