Loading wads ingame with Zdoom

Is it possible to do that with a command of some sort?

While there is a console command that loads WAD files (pullin), it's reserved for CFG files and will NOT work if you were to type it in game.

Damn...

Only Skulltag can load wads in-game.

In the IE pages in Legacy Docs folder included with Legacy it states to use command "ADDFILE" to load Pwads in-game. While in console for Doom.wad, I attempted to ADDFILE P.WAD I have in the directory, the console confirmed the load of M1-M9, showed the lump load of 100, but when warping to map from Pwad it crashes, stating "cannot find flat 19". Can you tell me anything to try? Thank you