How to make a pwad?

[ChicagoTrash]

I'm basically a mapping noobie, so don't be surprised with this incredibly dumb question. I had been editing an Iwad, which I now know is bad. I was wondering how to create a Pwad so that I can still play classic doom. Again, sorry for this extremely dumb question.

[Empyre]

Start a new map in your map editor of choice, and when you save it, you will give it a file name.  Then, you will have a pwad with your map in it.  Later, you can open that wad and edit the map some more and/or you can load the wad in your port of choice to test the map.