Sega Master System / Mark III / Game Gear
If you are using windows, it will make your life a lot easier, if you enable Quick edit for your command line terminal. To do that, go to RUN [or press Windows Key+R] and type "cmd." Right click on the window title and select properties. Select the Options Tab and make sure Quick Edit is checked. You may also select Insert text. Click Ok to continue. This will allow you to copy data straight from one command line window to another or even another document simply by selecting the text you wish to copy, and right clicking once to copy and then right clicking to paste. It is not only faster (than typing out manually), but is less prone to error. You will likely make some mistakes when first starting out, but this will greatly reduce that possibility.
Also, it is suggested that you extract the VGM Tools Collection to a directory on your computer and that you add that directory to the Path Variable. To do this, go to RUN [or press Windows Key+R] and type "sysdm.cpl". Press return and select the Advanced Tab. Near the bottom, select the "Environment Variables" button. Look for the Path variable in either the User or System variables section. User variables are for the current user. System variables are global (all users). Either one will do. Select edit, and (separate by ;) append the full path to the tools to the existing list of entries. You will need to reboot the computer for the changes to take effect, or to set the path temporarily in a Command Prompt terminal. This will allow you to use the tools from any directory.
A simple tip to open a command line terminal wherever you are is to select a folder, and while making sure no file/folder is selected, hold Shift + Right Click. Then select "Open command window here". These command line tools also allow you to drag files onto the (though one at a time). There will be times where you will want to run an executable from the command line. Using batch scripts is also a useful alternative approach.