Not all commands support alternate data stream (ADS) filename syntax. Most built-in DOS commands have no idea. However, file redirection works so you can do things like MORE <somefile.txt:streamname. WordPad will take an ADS path, but Notepad has trouble with them because it always wants to add a ".txt" extension.
... until the collector arrives ...
This "blog" is really just a scratchpad of mine. There is not much of general interest here. Most of the content is scribbled down "live" as I discover things I want to remember. I rarely go back to correct mistakes in older entries. You have been warned :)