Oh, my apologies. I thought you were trying to do the network and command prompt one together.
Yes, you will be able to add as many different ones as you want to the Windows Boot Manager like in the msconfig screenshot below.

Could you post screenshots of your command prompt doing the tutorial to see if anything (error messages, mistakes, etc...) may stand out as a cause for you?
If you had msconfig opened while doing the command prompt, then close and reopen msconfig to see if it's there afterwards.